4.76+3.21=4.77-3.86=3.65+3.75=1.27+6.29=6.06-
5.93=
6.98-3.77=
7.95-2.68=6.25+6.81=1.84+2.06=8.77+3.31=
8.11-5.25=
9.61-7.97=7.56-2.61=9.96+8.73=8.96-2.44=3.78+5.63=
7.9-3.66=
8.49-8.11=4.89-3.03=3.99+9.58=
5.51+9.41=
6.36+5.28=8.6-5.44=
4.45+
5.24=
7.25-1.2=
7.85-5.85=
7.71-7=
1.85-1.09=
3+4.39=
1.7+4.68=
5.62-3.42=
9.49+4.6=
5.52-2.89=
2.21+5.96=
7.43+7.3=
4.6-4.07=
3.99-3.06=
7.85+7.01=
7.58+9.51=
3.94-1.54=
5.23+4.84=
8.76-3.69=
9.8-2.6=
5.44+8.38=
6.3-1.93=
9.74+4.79=
2.25+4.14=
9.47-4.03=
6.38-4.26=
8.07+7.76=
2.79+9.2=
9.47+8.8=
4.35-1.85=
4.28-4.21=
5.26-2.53=
1.27+3.85=
9.65-4.51=
2.28+4.4=
6.39-1.48=
5.33+7.91=
6.49+4.97=
5.68+3.26=
1.28+4.5=
9.34-1.49=
5.29-5.09=
7.92+9.92=
9.83-7.05=
2.55+
3.72=
9.81-4.82=
6.93-2.15=
9.55-8.45=
4.67-4.33=
4.47+9.36=
6.54-1=
5.64-4.42=
3.36-1.77=
5.67-5.6=
4.49-1.06=
9.75-8.01=
2.06+8.46=
4.16+2.74=
5.52-1.1=
5.81+5.09=
6.09-4.14=
8.21+9.22=
7.53+4.83=
6.91-6.16=
5.96-4.41=
8.44-1.71=
8.74+4.89=
9.52-7.99=3.59+8.35=5.9+8.9=7.65-6.87=7.84-2.06=9.14+5.26=7.77+5.55=2.34+1.06=8.94-1.07=1.28+3.47=9.21-5.67=4.83-4.2=4.73+7.51=4.88-1.05=
7.31+2.79=
8.82+4.56=6-3.93=5.86-5.36=9.61-2.16=6.24-3.37=5.29-4.85=
7.84+6.77=
5.41-1.26=
7.83-1.39=
8.4+2.36=
9.49+6.44=
8.56+4.49=
6.43+5.24=
5.27-4.59=
8.49+2.82=
4.87+3.45=
2.86-1.29=
9.85-8.21=
4.04+9.53=
6.62+6.33=
6.48-3.47=
2.59+5.78=
7.03-4.75=
9.21-3.91=
3.3+1.27=
7.15+9.04=
5.15+2.01=
1.71+6.08=
1.58+3.17=
5.08-3.23=
3.09+6.49=
9.77-5.61=
7.8-6.95=
3.24-1.11=
5.09-1.97=
5.31-4.98=
1.73+1.05=
7.26-6.61=
7.59+6.17=
2.83-1.68=
7.45+9.39=
4.38-1.86=
4.84+4.74=
7.05-5.05=
8.56+7.46=
9.59-4.84=
7.69-1.51=
3.87+1.71=
8.16-2.68=
3.5-1.92=
8.51-4.14=
5.78-5.29=
3.24+2.87=
2.23+9.08=
5.43+4.23=
6.43+9.07=
8.8+5.09=
7.14-5.75=
3.04+2.85=
5.19+2.48=
1.37+7.28=
4.83-4.8=
3.2+8.5=
3.2+3.07=
6.26-5.05=
9.19+5.04=
9.67-2.33=
5.58-2.7=
7.44+4.54=
3.7-2.31=
2+7.64=
9.51+1.1=8.33-1.9=5.2+2.53=8.62-5.99=7.62+1.62=3.41-1.44=7.05-4.55=1.69+9=9.33-2.82=6.62-6.06=4.83-3.18=3.19+9.83=9.05+1.64=8.49-3=3.51+8.93=3.93-3.84=2.22+8.52=4.72+5.45=7.67-5.86=2.35+3.75=7.66-7.51=6.66-3.44=
9.06-8.17=
7.12+4.9=
6.05-2.98=
3.75-2.23=
1.18+5.14=
8.18-3.4=
5.86-4.4=
6.11+9.29=
7.47-5.41=
9.37+8.58=
7.67-1.86=
9.23-1.09=
6.84+9.93=
5.2+3.84=
7.52-5.55=
2.94-2.92=
7.3-4.93=
9.56+9.64=
4.08+
5.74=
7.95-4.03=
9.19-1.11=
8.99+9.4=
6.04+4.37=
6.56+2.89=
2.18+1.87=
4.4+1.5=
7.12+1.45=
8.01-4.57=
9.61+9.53=
4.84+2.32=
1.77-1.12=
8.48-6.21=
6.84-3.98=
9.06-3.25=
9.05-2.84=
5.15+3.76=
4.1-3.57=
8.95-5.13=
9.79-1.37=
7.17+7.96=
5.47+3.9=
2.74-2.57=
9.67+2.36=
4.27-2.56=
9.24+2.1=
9.95-3.13=
5.26+7.49=
7.81-6.27=
9.42+4.85=
9.41-6.31=
4.7+3.25=
9.02+9.8=
4.47+7.17=
9.12-3.42=
8.34-3.36=
7.08-3.64=
2.46+5.84=
5.2+7.63=
5.5+1.31=
5.2-1.85=
5.34+7.14=
6.21+5.3=
9.29-2.32=4.82+9.73=8.82+4.47=7.78+4.46=2.45-2.06=5.82+5.86=2.34+6.49=6.42+6.72=9.04-7.67=1.93-1.57=9.77-3.5=9.21+6=4.74+2.41=7.43+6.53=9.75-3.13=4.98-1.46=6.73-3.03=
4.75-4.01=
5.9+7.76=8.5-2.53=8.88+7.64=2.96+
6.16=
7.32+1.42=
9.43-3.56=
7.68-3.16=
2.97+2.11=
3.7+3.83=
7.14-1.53=
2.44-1.13=
2.94+
3.54=
9.9-7.04=
6.43+9.65=
7.86-7.16=
7.32+1.04=
4.33-4.19=
9.31+8.58=
3.16-1.03=
6.85-4.39=
2.97+1.46=
5.21-4.29=
7.37+2.83=
5.22-4.49=
5.7-4.6=
4.67+2=
7.13-6.62=
3.74-3.15=
7.3-2.14=
6.83-6.6=
6.41-4.28=
5.61-4.6=
9.82-1.59=
8.96+5.4=
9.06-6.21=
2.18+2.76=
2.57+8.11=
9.12-3.08=
1.07+9.79=
5.79-5.74=
3.01+6.96=
6.19+6.77=
3.07+3.75=
4.86+1.48=
7.31-5.41=
6.77+
7.19=
1.31+
2.62=
3.91+
4.1=
7.31+6.89=
1.54+5.12=
7.51+7.09=
8.45-1.72=
7.69-1.05=
8.81-7.15=
3.11+1.05=
7.71-1.05=
9.36-5.66=
5.35+9.13=
1.58+
2.5=
6.79-1.03=
9.91-5.74=
5.42+
6.51=
4.96-3.34=
2.68-1.8=
2.54+8.33=
6.76+6.54=
7.24-6.67=3.69-2.47=7.08+5.22=
4.46+9.93=
5.21-4.55=3.96-3.65=3.21+1.2=7.57-5.97=2.62+9.29=8.27+9.29=4.19-2.08=4.31+9.35=
6.52-3.35=4.53+1.82=9.48-4.63=9.87-6.15=
6.81-1.18=
7.65-5.26=9.75-3.11=6.12+6.15=6.82+3.37=4.74+4.98=
1.16+4.74=
3.59+
4.3=
1.65+6.46=
2.47+4.25=
4.83+4.01=
7.44+6.69=
5.88-1.04=
3.72-2.49=
8.81-5.76=
4.8-4.32=
7.35-4.47=
3.82-3.72=
7.02+2.18=
5.04+5.76=
4.57+4.54=
8.2-7.56=
7.66+4.2=
9.1-8.01=
7.19+1.36=
9.58-4.16=
7.11-1.84=
8.34-4.16=
6.6-1.81=
7.83+8.64=
9.37-5.7=
9.17-1.51=
8.81+2.12=
2.68+6.94=
7.46-2.52=
8.79+7.12=
6.76+4.79=
7.57-7.5=
2.98+
3.6=
9.74+6.63=
1.62+6.86=
7.78-5.28=
7.04-3.52=
9.82-1.88=
7.4+7.22=
7.53+3.08=
1.38-1.05=
4.45+2.6=
7.06+9.46=
2.18-1.81=
2.46+4.54=
7.22-4.99=
1.05+
2.71=
7.67+8.89=
6.66+1.64=
6.94-1.31=
4.91-1.29=
8.79+6.82=
9.2+6.94=
9.37-7.88=
3.78+6.38=
5.63+
6.43=
8.86+6.97=
4.52+9.67=
8.61+5.81=
9.03+3.42=
7.21-2.27=
8.91+1.32=
8.44+5.62=8.08+1.3=8.93+7=8.91+4.11=8.95-8.15=
7.43-4.43=
8.7-4.99=6.76+7.85=1.1+2.83=3.35+6.08=6.98+1.65=9.71-3.65=7.31+4.24=2.67+2.51=9.81-9.26=7.97+4.76=9.99+8.35=3.9+3.49=9.34-5.88=7.77-2.19=9.83+6.01=8.29+5.72=
3.04+9.93=
4.45-2.75=
1.75+7.66=
5.91-5.13=
7.93-3.48=
3.14-2.65=
5.56+2.78=
7.51+7.65=
3.35+6.65=
8.52-8.47=
5.29-2.79=
5.98-4.53=
5.77-3.68=
7.19+1.36=
3.54+2.8=
9.28+5.82=
6.44+9.02=
9.75-4.88=
2.2+1.15=
2.62+
3.29=
4.17-3.02=
8.88+7.59=
6.38+
7.37=
1.79+7.12=
1.13+8.84=
9.94+4.62=
1.35+4.94=
1.12+
2.72=
1.68+2=
1.64+8.93=
5.12-1.76=
5.3+4.74=
6.42-4.29=
8.95-4.7=
9.19-1.06=
3.69-3.03=
4.59-1.68=
4.14-1.21=
6.69+1.45=
2.92+7.45=
7.67+2.78=
6.96+2.72=
8.39-7.86=
7.99-6.51=
9.88+1.49=
4.36+6.65=
4.21-4.14=
4.92-2.66=
6.4-5.05=
7.76-3.12=
3.23+
4.46=
7.61-5.43=
8.31+6.75=
6.09-2.65=
4.86-2.49=
8.61-2.94=
1.21+9.49=
7.36+8.75=
8.95+7.49=
7.19-2.35=
7.92-1.23=
9.08-1.42=
8.32-2.54=
6.43+1.32=
7.48-1.93=4.41+9.01=
4.35+4.49=
5.66-4.35=9.5-3.62=7-5.71=
6.26-5.55=2.12+8.94=
7.89+8=7.64-2.41=3.89+5.16=9.71-7.39=4.6-3.51=9.54-
8.93=7.95+3.31=
9.15-9.06=5.04-2.9=5.58+4.56=7.23-6.4=
1.08+7.69=
2.33-1.36=7.37-1.11=4.9-1.49=9.9-
3.99=
四年级小数加减法 竖式计算 7.9+53.1= 56.8+23.1= 36.4-27.1= 51.1+35.9= 1.2+96.6= 4.6-35.6= 11.23-0.88= 22.56+14.62= 56.78-21.5= 96.1-43.2= 0.9+1.6= 4.5+3.4= 2.7+ 3.9= 41.6- 4.8= 18.6+4.7= 1-0.44= 0.7+0.9= 3.25+0.75= 14.6-0.4= 10-0.1= 1-0.78= 20.1-0.3= 15.6-0.08= 11.1-5.6= 16.4+2.35= 84.2-6.22= 1.6+3.45= 17.2+25.9= 21.3+14.3= 9.13-8.28= 14.4+33.99= 29.8-14.6= 26.3-16.2= 35.2+56.8= 1.99+21.7= 13.88-9.21= 20.33+9.88= 36.5-5.71= 63.4+52.1= 93.1-20.9= 67.1-13.1= 123.9+455.6= 3.88-5.77= 33.72+22.3= 123.2+65.1= 16.3+97.5= 78.9+65.4= 22.5-19.5= 73.55-14.68= 46.32+65.18= 5.44+53.12= 96.42-13.88=
42.5+17.8= 63.22+22.77= 69.12-58.39= 63.2-45.4= 42.55-0.69= 0.55-0.33= 45.96-24.41= 75.2-28.3= 1456.23+9.6-8.6= 5.2+6.3-584.3= 8.42+9.48= 42.56+3.124= 91.26-30.35= 15.6十0.237= 80-52.1= 7.35-1.41= 14.33+5.46= 12.59+7.03= 25.7-12.2= 3.3+22.75= 14.9+3.49= 12.75-6.039= 13.01-3.1= 89-9.57= 16.35+3.59= 8.42+9.48= 42.56+3.124= 91.26-30.35= 80-52.1= 7.35-1.41= 15.6十0.237= 15.84-13.97= 21.46+43.96= 9.6-5.8= 8.25+2.46= 28.97-19.78= 28.42-16.38= 12.48+7.54= 1.62+1.41= 67.83-45.9= 83-8.45= 13.98-2.88= 0.98+2.56= 18.72-9.83= 50.35-28.44= 25.5-3.26= 8.95-4.44= 9.56+3.44=
(北京版)四年级数学下册小数加减法的简便计算 班级______姓名______ 一、口算。 2.1+2= 0.3+0.7= 3.4+1.6= 7.6-0.5= 3.7-0.9= 2.13-0.02= 3.41+0.2= 102+0.3= 112-1.02= 4.5-0.01= 二、火眼金睛辩对错,并且改正。 (1)12.45-1.35-0.65 (2)21.32-(6.32+8.3)=21.32-6.32+8.3 =12.45-(1.35+0.65) =15+8.3 =12.45-2 =23.3 () =10.45 () 三、用简便方法计算。 (1)27.3+73.2+72.7 (2)585+189+215 (3)5.85-1.75-0.25 (4)768-274-126 (5)5.85+1.89+2.15 (6)24.8+14.6+15.4 (7)42.5-22.17-7.83 (8)3.8+1.37+6.2+12.63 四、火眼金睛辩对错。 1. 整数加法交换律、结合律对小数同样适用----------------() 2. 4.72+0.1-4.72+0.1=0 -----------------------------( ) 3. 计算小数加减法,得数的小数部分有0的要把0去掉------() 4. 小数加减法混合运算一定要先算加法,后算减法-----------() 五、解决问题。 1. 某天早上气温是6.5℃,中午气温比早上升高了3.1℃,晚上比中午降低了4.5℃,请问这天晚上的气温是多少? 2. 妈妈买水果花了5.8元,买蔬菜花了2.6元,买鱼花的钱比水果和蔬菜的总和还多5.2元,买鱼花了多少钱?
小数加减法口算练习题
6.54+0.58= 54.49-22.5= 23.5+21.35= 9.36+43.56= 16.65+18.87= 0.99+24.85= 9.45-6.61= 85.69-48.58= 45.46-26.57= 64.19-29.57= 33.84+16.5= 3.85+61.18= 35.65-19.9= 6.49-4.81= 35.4-24.58= 52.65+9.25= 21.65+4.05= 26.65-15.24= 56.56-12.87= 9.08-1.28= 64.25-52.73=
8.43+8.81= 26.34-15.24= 17.38+15.25= 16.68-9.54= 54.63-42.14= 13.24+8.64= 16.25-7.94= 63.43-18.18= 16.36+56.16= 41.98+18.24= 45.52-22.18= 69.52-31.48= 6.84-5.73= 0.97+6.13= 5.03-2.90= 4.9-0.85= 2.13+6.89= 1.72+ 3.6= 17.2-0.36= 5.40- 4.86= 11.6-9.23=
9.25+2.25= 4.22+8.46= 5.63+1.25= 9.36-1.59= 5.63-5.21= 4.65-1.15= 7.65-4.19= 8.88-2.69= 0.72+0.91= 0.83+0.68= 8.24+3.76= 4.12-3.8= 14.3+0.78= 1.3+8.56= 0.8-0.55= 4-0.04= 1.2-0.03= 3.5+3.05= 0.8-0.45= 0.78+2.2= 5.2-0.08=
小数加减法的训练:(B) 1. 小数数位相同的加减法(竖式计算)7.51+0.49=9.03-8.57= 27.38+4.83=26.75+ 2.83= 3.64-2.58= 6.52-3.44= 5.48-3.25= 4.8+18.9= 1 5.31+13.51=9.03-8.57=10.3+58.7=8.03-4.56= 5.5+4.5= 3.27-2.49= 8.25+1.55=9.43-9.05= 11.65-7.39=19.01-7.99= 1.75+2.08= 4.28-3.37=
4.13+2.24= 5.16+7.89= 10.2-8.75=12.7+6.58= 4.17+2.53= 5.07-0.98= 7.3-2.25= 3.8+3.54= 5.67-0.73=13.18+5.27= 3.05-2.9= 3.1-2.07= 小数加减法的训练:(B) 2.小数数位不同的加减法 26.8+3.02= 6.07-4.993=7.81-3.735=12.16+5.347= 3.7+2.36=15.4+2.97= 0.4-0.125=18.7+3.96=
9.6+4.78=62.1-17.07= 75.6-3.55=10.1-0.55= 5.67-0.845=0.506-0.19= 5.94+10.7=12.03+0.875= 11.04-7.3= 1.4-0.405= 37.8+3.02=0.704-0.25= 1.4-0.405= 3.906+0.66=小数加减法的训练:(B) 3. 整数与小数的加减法 10+10.1=27+8.03= 43.5-27.34=15.98-3.9=
五年级数学小数加减法计算题(简便计算) 13.6+7.84+6.4 38.7-14.47-5.53 8.5+9.9 1.31+4.7+0.69+5.3 1.25+3.7+0.75 5.6-0.18-1.2 7.08+16+8.2 10+0.009+0.191 3.75-0.75-1.25 80-19.4-8.09-3.51 5.6+0.5-5.6+0.5 7.2+5.6-2.8 34.5-(17.2+4.5) 27.3+73.2+72.7 585+189+215 5.85-1.75- 0.25 768-274-126 5.85+1.89+2.15 24.8+14.6+15.4 42.5-22.17-7.83 3.8+1.37+6.2+12.63 45.55-(6.82+15.55) 34.52-17.87-12.23
4.57+3.17+3.43+ 5.83 23.75-8.64-3.36 17.83-9.5-7.83-0.5 3.45+8.7+16.55+1.3 8.54-5.96 27.38-5.34+2.62-4.66 21.63-(8.5+9.63) 45.55-(6.82+15.55) 34.52-17.87-12.23 4.7+3.17+3.43+ 5.83 23.75-8.64-3.36 17.83-9.5-7.83-0.5 3.45+8.7+1 6.55+1.3 2 7.38-5.34+2.62-4.66 21.63-( 8.5+ 9.63)
4.32-(1.26+2.34) 2.5+3.25+0.75+7.5 2.53+1.79+ 3.47 10.08- 4.79-1.21 17.05-(2.05-6.4) 3.73+5.28+ 4.27+4.72 103 +10017+100029 108米-1008米-1000 8米 3元5角+2元5角-1元8角3分 9.4+0.3-6.4 15.25+4.72+4.75+5.28 34.82-(4.82+15.2) 12.7-4.8-5.2 3.1+25.78+6.9 73.8-1.64-13.8-5.36 45.55-(6.82+15.55) 34.52-17.87-12.23 4.57+3.17+3.43+ 5.83 23.75-8.64-3.36 17.83-9.5-7.83-0.5
1.5-0.5= 1-0.9= 2.3+0.6= 0.9+0.8= 1-0.3= 3.4-1.5= 1.9-0.9= 3.5-2.4= 0.36+0.64= 3.5+ 4.2= 6-0.5= 2.7-0.4= 0.8+ 0.7= 4.5-3= 7.8-1.1= 1.5 -0.5= 1-0.9= 2.3 +0.6= 0.9 +0.8= 1.9 -0.9= 3.5 - 2.4= 0.36 +0.64= 0.96 -0.3= 8.65 -6.31= 2.5+0.9= 1.2-0.5= 7.8+1.6= 0.39+0.15= 3-1.4= 4.7-2.8= 7.2-6.45= 15-0.48= 6.77-1.78= 3.45+5.75= 3.40+58.20= 49.80+49.20= 111.6-99= 7.8+21.02= 5.6-1.42= 12.5+0.9= 4.5-2.83= 3.75+2.25= 2.98+0.56= 12.53+4.67= 6.07+4.89= 5.64-1.78= 10.2-6.45= 5-0.41= 0.3+1.5= 2.5+9.8= 7.6+1.3= 4.4+ 5.7= 2.3+7.7= 5.7+3.1= 7.69+2.31= 9.16+2.64= 5.68+12.22= 16.8+16.5= 26.3+14.6= 6.9+3.4= 52.3+64.7= 12.75-5.3= 8.24+16.93= 0.75 +0.4= 20+0.78= 4.8 +4.2= 5.7 -3= 4.9 -1.7= 1.34 + 0.8= 2- 0.75= 8.7 +0.03= 0.2 - 0.09= 8.5 + 2.5= 2.4 - 1.4= 0.68 +0.42= 7.82 -7.2= 2+9.1= 0.48 +0.52= 8.1 - 5.1= 0.78 -0.24= 0.8 + 0.18= 0.89 -0.25= 1-0.98= 0.9 + 0.1= 1-0.8= 4.5 - 4= 5.6 + 4= 10-4.4= 6+6.6= 9.5 - 2.7= 1-0.55= 3.7 + 4.8= 7+3.3= 3.25+0.75= 2.7 + 3.9=
---------------------------------------------------------------最新资料推荐------------------------------------------------------ 小数加减混合运算练习题带答案的小数加减混合运算练习题带答案的小数的加法和减法第 2 节小数加减法混合运算习题一、口算。 1.0.78-0.28=2.0.8-0.3=.10-0.3= 4.0.8-0.13=.6.4+6=.10+0.3= 7.0.57+0.16=.1-0.7=.12-1.2= 10.0.4+0.6= 11.3+1.7= 12.0.76-0.6=二.填空。 1.计算小数加减法时,要先把各数的对齐,也就是把对齐,再按照加减法的法则计算。 2.用 3、1、6 这三个数字和小数点组成的最大一位小数是,组成的最小一位小数是,它们的差是。 3.比 5.2 少 1.8 的数是;12.95 比少 3.05。 4.两个加数的和是 8.5,其中一个加数是 4.8,另一个加数是。 5.7.42+=12.20-=10.5 6.6.25 元=元角分15 米 20 厘米=米 3.2 米=米分米三.判断题。 1.整数都比小数大。 2.两位小数一定比一位小数大。 3.两个小数相加,末尾的数都要对齐。 4.6.3+7.4-6.3+7.4=0。 5.3.60 元比 3 元零 9 分少些。 1/ 3
6.3.6 和 3.60 的大小相等。 四、先说说小数加减混合运算的顺序,再计算下面各题。 1.17.8-.3.25+第 1 页共 1 页 3.1 -0.988+0.001.15.021+ 5.48.6--12.058 五、 看图计算。 a.一个足球比一个排球贵多少钱? b.三种球各买一个要花多少钱? 第页共页 c.用 100 元钱买一个足球,一个排球,还剩多少钱? 六、算面积。 1.一段钢材长 8.4 米,锯成三段,第一段长 1.8 米,第 二段长 2.2 米,第三段长多少米? 2.甲乙两个工程队共 同修一条公路,甲队每天修62.5 米,乙队每天修 77.2 米,10 天 完成任务。 这条公路有多少米? 3.小青家房屋总面积是 72.5 平方 米,两个卧室的面积是 28.6 平方米,卫生间、厨房、阳台等的面 积是-平方米,其余是客厅,客厅的面积是多少平方米? 第页共页第页共页《小数加减混合运算》 习题一、计算 7.24+0.36-0.52=-0.07+3.42= 2.7+9.73+0.61=.52-1.5-5.88= 48 3.4-39.5-98.8= 9.54-7.4-1.09= 40-= .5+4.85-6.13= 17.52 -9.87+3.65=92.3-= 55.24-= 14.52-8.68+7.75= 二、应用题某造纸厂七月和八月共造纸 3.24 吨,其中七月 造纸 1.56 吨,八月比七月多造纸多少吨?三、列式计算
小数加减法的简便运算 例1. 6.28+5.74+3.72+5.26 4.36+14.8+5.64+5.2 16.9-5.6-4.4 38.2,7.09,20.6,2.31 9.08-(5.7+1.08) 27.85,(7.85+3.4) 课堂练习: (1)27.3+73.2+72.7 (2) 585+189+215 (3) 5.85,1.75,0.25 (4)768,274,126 (5) 5.85+1.89+2.15 (6)24.8+14.6+15.4 (7)42.5,22.17,7.83 (8)3.8+1.37+6.2+12.63 (9)17.05,(2.05,6.4) (10)3.73+5.28+4.27+4.72 (11)10-3.6-1.4 (12) 1.2+2.5+1.8 1 (13)0.25+0.15+0.75+0.85 (14) 0.5+1.5+1.5+0.5 (15)5.26+3+1.74 (16) 3.46+1.28+0.54+2.72 (17)24.8+14.6+15.4 (18)5.85,1.75,0.25 (19)21.32,(6.32+8.3) (20)12.45,1.35,0.65 (21)27.3+73.2+72.7 (22)42.5,22.17,7.83 (23)3.8+1.37+6.2+12.63 (24)(15.28+28.99)+20.72 (25)5.85+1.89+2.15 (26)24.8+14.6+15.4 小测: 小数加减法练习题 一、直接写得数。 1.5,0.5, 1,0.9, 2.3,0.6, 0.9,0.8,
4.7+3.1=4.7-3.8=3.6+3.7=1.7+6.9=6.6- 5.93= 6.8-3.77= 7.5-2.68=6.5+6.81=1.8+2.06=8.7+3.31= 8.11-5.2= 9.61-7.7=7.56-2.6=9.906+8.73=8.96-2.404=3.782+5.63=7.9-3.666=4.89-3.03= 3.99+9.58= 5.51+9.41= 6.36+5.28= 4.74+7.79= 5.1+1.2= 8.6-5.4= 4.4+ 5.4= 7.2-1.2= 7.8-5.5= 7.1-6.7= 1.5-1.09= 3+4.39= 1.7+4.68= 5.2-3.42= 9.4+4.6= 5.52-2.8= 7.43+7.3= 4.6-4.07= 3.99-3.06= 7.85+7.501= 7.538+9.51= 3.94-1.54= 5.23+4.845= 8.76-3.69= 9.8-2.6= 5.44+8.38= 9.49+6.44= 2.5+5.3= 6.3-1.9= 9.7+4.9= 2.2+4.4= 9.4-4.3= 6.3-4.26= 2.9+9.2= 9.4+8.8= 4.5-1.85= 4.28-4.21= 5.26-2.5= 1.27+3.5= 9.65-4.5= 2.208+4.4= 6.339-1.48= 5.331+7.91= 6.49+4.97= 5.68+3.216= 1.28+4.5= 9.34-1.49= 5.29-5.09= 7.92+9.92= 5.86+5.69=
9.3-7.5=2.5+3.7=9.8-4.2=6.3-2.5=9.5-8.45=4.7-4.33=4.7+9.36=6.54-1= 5.6-4.42=3.36-1.77=5.67-5.6=4.49-1.6=9.75-8.01=2.06+8.46= 4.16+2.764= 5.52-1.1=5.81+5.09=8.21+9.22= 7.53+4.83= 6.91-6.16= 5.6-4.241= 7.05-5.075= 3.12+2.09= 8.44-1.71= 8.74+4.89= 9.52-7.99= 3.59+8.35= 5.9+8.9= 7.65-6.87= 7.84-2.06= 9.14+5.26= 7.77+5.55= 2.34+1.06= 8.94-1.07= 9.21-5.67= 4.83-4.2= 4.73+7.51= 4.88-1.05= 7.31+2.79= 8.82+4.56= 6-3.93= 5.86-5.36= 9.61-2.16= 6.24-3.37= 1.62+1.47= 5.32+ 6.17= 5.29-4.85= 7.84+6.77= 5.41-1.26= 7.83-1.39= 8.4+2.36= 8.56+4.49= 6.43+5.24= 5.27-4.59= 8.49+2.82= 4.87+3.45= 2.86-1.29= 9.85-8.21= 4.04+9.53= 6.62+6.33= 6.48-3.47= 2.59+5.78= 7.03-4.75= 9.21-3.91= 3.3+1.27= 7.15+9.04= 5.15+2.01= 7.21+8.84=
6.58-0.37 = 6.58 - 0.37 ———— 0.9+0.41 = 0.90 + 0.41 ———— 9.93-4.5 = 9.93 - 4.50 ———— 0.845+0.457 = 0.845 + 0.457 ————6.3-0.81 = 6.30 - 0.81 ———— 0.88-0.67 = 0.88 - 0.67 ———— 8.96-3.39 = 8.96 - 3.39 ———— 0.966+0.507 = 0.966 + 0.507 ———— 4.71+0.13 = 4.71 + 0.13 ———— 0.93-0.68 = 0.93 - 0.68 ———— 9.15-2.5 = 9.15 - 2.50 ———— 0.836-0.43 = 0.836 - 0.430 ————
2.73 - 0.19 ———— 0.9-0.48 = 0.90 - 0.48 ———— 8.17+2 = 8.17 + 2.00 ———— 0.8+0.116 = 0.800 + 0.116 ———— 1.28 + 0.55 ———— 0.98+0.16 = 0.98 + 0.16 ———— 8.01-2.17 = 8.01 - 2.17 ———— 0.822+0.437 = 0.822 + 0.437 ———— 1.82 - 0.65 ———— 0.96-0.36 = 0.96 - 0.36 ———— 8.11+2.57 = 8.11 + 2.57 ———— 0.986+0.638 = 0.986 + 0.638 ————
3.34 + 0.26 ———— 0.9+0.11 = 0.90 + 0.11 ———— 8.99+2.49 = 8.99 + 2.49 ———— 0.836-0.298 = 0.836 - 0.298 ———— 3.77 + 0.81 ———— 0.82+0.33 = 0.82 + 0.33 ———— 9.34-3.89 = 9.34 - 3.89 ———— 0.924-0.6 = 0.924 - 0.600 ———— 9.95 - 0.65 ———— 0.85-0.63 = 0.85 - 0.63 ———— 9.35-4.49 = 9.35 - 4.49 ———— 0.886+0.607 = 0.886 + 0.607 ————
小数加减法的简便计算 一、教学内容 人教版四年级下册79页内容 二、教学目标 1 使学生知道整数加法运算定律和减法运算性质也适用于小数加减法。 2使学生会应用运算定律和减法运算性质比较熟练地进行小数加减法的简便计算。 3 在学习掌握小数加减法基础上学习小数加减法的简算。 4提高审题能力。 三、教学重难点: 重点:判断小数加减法是否可以简算。 难点:能正确应用加法运算律进行一些小数加、减法的简便计算。 四、教学过程: (一)复习导入 1口算 3.5+1.5= 105-75= 41+19= 9-5.7= 3.7+8.4= 8.1+ 4.6= 2 笔算 13.87+5.7 5.8+15.06-4.7 5.8+(10.1-2.3) (二)探究新课 1比一比看谁算的又对又快 (2.6+5.3)+1.7 (25+85)+15 0.6+7.91+3.4+0.09 5.42-0.8-1.2 2教师展示做法 (2.6+5.3)+1.7 =2.6+(5.3+1.7) =2.6+7 =9.6
(25+85)+15 =25+(85+15) =25+100 =125 0.6+7.91+3.4+0.09 =(0.6+3.4)+(7.91+0.09) 5.42-0.8-1.2 =5.42-(0.8+1.2) =5.42-2 =3.42 3教师展示简便做法让生总结做法:整数加减法的运算定律在小数计算当 中同样适用 (三)运动会 教师提出问题;通过这个表格你发现了什么信息,还能提出什么数学问题? 生;这四位同学的总成绩是多少? 小组讨论列式并找同学汇报结果;1用常规方法 2用简便方法 教师揭示另外一个简便方法 9.12+9.83+9.62+9.88 =4*9+(0.12+0.88)+(0.38+0.62) =36+2 =38 教师总结;小数加减法的简便方法要根据小数的特点选择合适的最的 方法解决问题 (四)巩固练习 1填空 6.7+4.95+3.3=6.7+()+4.95 (1.38+1.75)+0.25=()+(+ ) 61.5-37.67-11.54=61.5-()-()
小数加减法的简便计算教学设计 【教学内容】人教版四年级数学(下册)第六单元104页例4“小数加减法的简便计算”。 【教学重点】经历整数加法运算定律对于小数同样适用的简便过程,运用整数的运算定律进行小数的简便计算。 【教学难点】能够根据数据特点选择科学的简算方法,解决实际生活中的问题。 【教学过程】 一、整理回顾,复习铺垫 1、算一算: 4.47+6.53 22.6+77.4 2.0 - 0.6 3.8+0.12 0.63+()=1 10 - ()=3.4 2、想一想:我们学过哪些加减法的运算定律和性质?用字母怎样表示?(加法交换律,加法结合律,减法的性质) 3、说一说:下面各题可以使用什么运算定律使计算更简便?48+25++175 130-75-25 52+176+48+24 (揭示课题并板书) 二、创设情境 1、课件出示104页主题图。课件显示育才小学春季运动会的场景。学校要举行运动会,打算派四名同学参加接力赛。这四名同学总成绩可能是多少? 2、观察主题图,你获得了哪些数学信息? 3、列出算式:8.42+8.46+8.54+8.58 师:你会解决这个问题吗?
怎样列式?(生说师板书算式) 三、自主探究 1、生独立列式解答,3生上台板书汇报: 方法一:8.42+8.46+8.54+8.58 =16.88+8.54+8.58 =25.42+8.58 =34(秒) 方法二:8.42+8.46+8.54+8.58=(8.42+8.58)+(8.46+8.54)=17+17 =34(秒) 方法三:8.42+8.46+8.54+8.58=8×4+(0.42+0.58)+(0.46+0.54)=32+1+1 =34(秒) 2、生对应板书说算法师:你是怎样算的?(个别回答,重点解释第三种算法) 3、对比优化算法你更喜欢那种方法?为什么? 4、观察对比三种算法,你有什么发现?(课件同时出示三种算法)师:仅从这一题我们就能肯定整数运算定律适用于小数吗?你有什么办法? 5、进一步举例验证:(1)3.2+0.5 0.5+3.2 (2)(4.7+2.6)+7.4 4.7+(2.6+7. 4) (3)2-0.75-0.25 2-(0.75+0.25) 师:像这样的例子你还能举吗?(生举例,师板书) 6、得出结论:整数的运算定律在小数运算中同样适用。 四、巩固应用 1、填空(课本104页“做一做”第1题) (1)6.7+4.95+3.3=6.7+ +4.95 (2)(1.38+1.75)+0.25=
8.60-6.39= 8.49+6.71= 8.06+1.37= 2.91+5.54= 2.44+4.86= 17.40-4.04= 0.45+5.47= 7.68-6.50= 3.83+9.45= 3.90-2.76= 6.01+5.39= 2.98+3.26= 6.97-5.97= 8.25- 4.64= 5.82-4.73= 8.78-0.52= 1.27+0.31= 8.42-7.04= 1 6.76+6.61= 0.41+0.95= 4.15+7.08= 2.59+9.10= 3.51+9.00= 4.54+2.55= 8.70+1.16= 1.31+ 5.61= 7.21-0.77= 8.64-7.85= 8.68+0.84= 2.62+3.19= 5.93-1.20= 3.66+5.90= 6.14-2.01= 5.58+0.13= 5.15-4.79= 5.29+6.33= 5.86-1.95= 3.79-3.47= 8.89-0.20= 7.42+9.92= 3.58-2.87= 7.31-2.51= 8.81-5.75= 6.67-2.72= 3.04+5.71= 1.73+ 4.32= 4.47+9.24= 8.53+3.94= 8.36-3.72= 6.78-1.84= 6.35-2.83= 4.36+7.50= 7.57+6.82= 5.18+2.34= 8.74- 6.93= 7.96+2.29= 4.58+5.79= 1.05+9.02= 4.30-4.19= 4.94-2.06= 7.93-4.75= 6.03-2.94= 4.62+3.02= 9.32+3.40= 5.43+3.23= 3.55+5.33= 8.21-4.90= 2.38+2.40= 9.28+1.69= 6.89-0.88= 4.97+7.29= 3.34+4.51= 6.29+0.67= 9.60+0.73= 2.23+5.50= 9.81-0.09= 2.80+6.46= 7.74+1.48= 4.22-2.66= 8.28+7.36= 7.48-6.52= 4.64-3.25= 5.62+2.82= 6.63+7.16= 5.94-0.36= 8.80+7.97= 7.87+9.72= 8.76+0.75= 7.37-4.92= 7.52-1.82= 3.42+6.99= 4.06+4.85= 7.55+7.05= 9.40-8.83= 7.41-2.14= 2.53+4.77= 8.23-2.35= 4.45+6.35= 1.00+4.02= 5.20-1.50=
四年级下册计算题库(一)——小数的加法和减法 1.小数数位相同的加减法(竖式计算) 5.5+4.5= 3.27-2.49= 11.65-7.39= 19.01- 7.99= 7.51+0.49= 5.48- 3.25= 4.8+18.9= 10.3+58.7= 8.03-4.56= 9.03- 8.57= 4.17+2.53= 5.07-0.98= 5.67- 0.73= 13.18+5.27= 5.16+7.89= 26.8+3.02= 6.07-4.993= 3.7+2.36= 15.4+2.97= 10.2-8.75= 7.81-3.735= 12.16+5.347= 0.4- 0.125= 18.7+3.96= 9.6+4.78= 5.67-0.845= 0.506-0.19= 11.04-7.3= 1.4-0.405= 62.1-17.07 1.4-0.405= 3.906+0.66= 43.5-27.34= 15.98-3.9= 75.6-3.55= 5.94+10.7= 12.03+0.875= 37.8+3.02= 0.704-0.25= 10.1-0.55=10+10.1= 27+8.03= 26+7.98= 13.99+1= 7.88+2 = 95-9.85= 20-9.42= 35.09-11= 96.85-85= 45.45- 45= 2.小数加减混合运算(递等式计算)
5.03-2.5+0.96 22.8-5.23-9.125 23.66+4.34- 3.56 5.6-0.81-1.29 15.9+3.26+4.17 67.2+41.5- 71.39 10.75+0.4-9.473 16.23+8.92-7.56 50-28.5- 13.45 13.79-9.653+170.57 1.5+0.68-0.306 72.8- 8.6+5.84 20.8-(15.98-3.9) 32.5+(5.07+6.13) 3.52-( 4.66-3.82) 3.小数加减简便运算(递等式计算) 0.9+1.08+0.92+0.1 5.26+3.43+0.74 5.6+2.7+4.4 0.15+7.62+7.85 51.27-8.66-1.34 48.14-2.43- 7.57 18.76-3.47-0.53 5.17-1.8-3.2 70.8-1.25- 1.75 4.02-3.5+0.98 4.25-0.83+0.75 23.04-0.8-13.4-6.2 15.13+4.92-5.13 3.98-1.5+6.02 4.8+1.2- 4.8+1.2 30.99-(8.5+15.99)
= += += = += += = + = = -= 1-= += += -= = += -= -= += += += = = += += = += += += += += ? = += += += += += += += += += += += += += += += 20+= += -3= -= += 2 -= += -= += -= += - = 2+= += -= -= += -= 1-= += 1 -= -4= +4= 10 -= 6+= -= 1-= += 7+= 3.25+0.75= += 0.7+0.9= +1= 14.6-0.4= 10-0.1= 14+0.78= 3+= 5-0.08= 1.64+2.35= 1.1-1= 8.34-6.22= += += -= += -= - = += += 88-= -105= += = += += +=
+= += += -= 10-= -= -= 17+= += 7-= 9-= += += += += += += += += += += += += += += += } += += += += -= 14+= += = += += += = = 10-= += += += += += += += += … += += += += += += += += += -= 14+= -= += -= 10-= 4-= 1-= += -= += 5-= += -= 10-= += += += += += += += -= += += += += += - = + = + = + = - = + = += += -= -= 1-= -= -= 15-= += += += += 102+=
四年级小数加减混合运算题 25.6-(0.23+5.6)-1.77 13.75-(4.75+6.48) 7.83+2.34-0.83+6.66 3.82+2.9+0.18+9.1 25.48-((9.4-0.52) 35.6-1.8-15.6-7.2 5.93+0.19+2.81 7.3+2.7-7.3+2.7 48.4+2.78+51.6-0.78 23.4+0.8-13.4-7.2 4.8+8.63+5.2+0.37 3.07-0.38-1.62 1.27+3.9+0.73+15.1 5.84-1.8-3.2 13 2.44-(58.74+19.44) 7.5+4.8-6.5 3.25+2.76+1.75 13.75-(3.75+6.48) 7.14-0.53-2.47 13.45-4.68+2.55 47.8-7.45+8.2
36.8-4.5+6.98 49.8-9.6+8.8 15.2-6.8-3.45 1.76+0.65+3.24 0.134+2.66+0.8 7.5+4.9-6.3 3.45+1.79+0.65 4.85+8.63+0.37 1.76+3.44+0.35 36.54-1.76-8.66 8-2.45-1.02 23.4+3.4-0.23 6.02+3.6+1.98 3.07-0.38-1.62 7.5+4.9-6.5 36.8-3.9-6.88 3.285+1.79+0.59 23.4-0.8+13.4 32+4.9-8.6 1.29+3.7+2.71 5.93+0.49+2.06 9-2.45-1.65 21+0.56+11.3 64.89-7.88-13.6
小数加减法的训练:(B) 1.小数数位相同的加减法(竖式计算) 27.38+4.83= 26.75+2.83= 3.64-2.58= 6.52-3.44= 15.31+13.51= 9.03-8.57= 5.5+4.5= 3.27-2.49= 11.65-7.39= 19.01-7.99= 7.51+0.49= 9.03-8.57= 5.48-3.25= 4.8+18.9= 10.3+58.7= 8.03-4.56= 8.25+1.55= 9.43-9.05= 1.75+ 2.08= 4.28- 3.37=
4.13+2.24= 5.16+7.89= 4.17+2.53= 5.07-0.98= 5.67-0.73= 13.18+5.27= 小数加减法的训练:(B) 2.小数数位不同的加减法 26.8+3.02= 6.07-4.993= 3.7+2.36= 15.4+2.97= 10.2-8.75= 12.7+6.58= 7.3-2.25= 3.8+3.54= 3.05-2.9= 3.1-2.07= 7.81-3.735= 12.16+5.347= 0.4-0.125= 18.7+3.96=
9.6+4.78= 62.1-17.07= 5.67-0.845= 0.506-0.19= 11.04-7.3= 1.4-0.405= 1.4-0.405= 3.906+0.66= 75.6-3.55= 10.1-0.55= 5.94+10.7= 12.03+0.875= 37.8+3.02= 0.704-0.25= 小数加减法的训练:(B) 3.整数与小数的加减法 10+10.1= 27+8.03=
小数加减乘除及简便计算习题 一、小数加法 4.12+8.59+ 5.88+1.41 12.87-1.34-2.66 21.53+4.87-2.53 15.21+(4.79-2.8) 12.19-2.6-2.19-3.4 109.72-(5.62+9.72) 21.3-19.9 39.6-(18.31+9.6) -1.69 14.25-2.45+5.75-3.55 24.51-3.14- 6.86+4.49 41.25+5.87-3.87+4.65 11.5+8.5-11.5+8.5 8.13-(12.25-11.87) 34.34-2.1-2.35-5.55 81.67+4.17+4.33-2.17 1.35+12.87-1.37+8.65 15.51-3.334-(2.666-4.49) 21.62-4.35+8.38-5.65
二、小数乘法和混合运算 0.125×3.69×8 (2.5-0.25) ×4 8.59×101 0.36×15.7-0.36×13.7 5.64×1.28+8.72×5.64 0.63×199 60÷48 7.73×0.5+2.27÷2 4.37+99×4.37 10.1×38.67-3.867 9.9÷5.5 8.63×25-0.063×250 9.3×10.1 3.99÷0.125÷8 0.99×0.81+0.11×9×0.19 (5.23+5.23+5.23+5.23) ×25 0.25×1.25×0.67×32 2.49×3.8+0.249×62 33.41÷4-3.41×0.25 54.8-0.3×0.3-3.91 (6.4+48) ÷0.8 15×9.7 2.5×(4+8) ×12.5 0.25×8×2.12 (12.5-1.25)×8 5.7×18.34-57×0.834 3.87×4.12+5.88×3.87 8.8÷5.5 3.25×199
创作编号: GB8878185555334563BT9125XW 创作者:凤呜大王* 五年级数学简便计算练习卷 下面各题怎样算简便就怎样算。 (1)小数加减法计算 6.9+4.8+3.1 0.456+6.22+3.78 15.89 +(6.75-5.89) 4.02+ 5.4+0.98 5.17- 1.8- 3.2 13.75-(3.75+ 6.48) 3.68+7.56-2.68 7.85+2.34-0.85+ 4.66 3 5.6 -1.8-15.6-7.2 3.82+ 2.9+0.18+9.1 9.6+ 4.8- 3.6 7.14-0.53-2.47
5.27+2.86-0.66+1.63 13.35-4.68+2.65 73.8 -1.64-13.8-5.36 66.86-8.66-1.34 36.8-3.9-6.1 32+ 4.9-0.9 25.48-(9.4-0.52) 3.9-4.1+6.1-5.9 15.02-6.8-1.02 32+4.9-0.9 146.5-(23+46.5) 9.43- (6.28-1.57) 4.8+8.63+ 5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.24 2.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+ 3.6+1.98
0.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5+4.9-6.5 创作编号: GB8878185555334563BT9125XW 创作者:凤呜大王* 3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55 3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 3.2+0.36+ 4.8+1.64
1.5-0.5= 1-0.9= 2.3+0.6= 0.9+0.8= 1-0.3= 3.4-1.5= 1.9-0.9= 3.5-2.4= 0.36+0.64= 3.5+ 4.2= 6-0.5= 2.7-0.4= 0.8+ 0.7= 4.5-3= 7.8-1.1= 1.5-0.5= 1-0.9= 2.3+0.6= 0.9+0.8= 1.9-0.9= 3.5 -2.4= 0.36+0.64= 0.96-0.3= 8.65-6.31= 2.5+0.9= 1.2-0.5= 7.8+1.6= 0.39+0.15= 3-1.4= 4.7-2.8= 7.2-6.45= 15-0.48= 6.77-1.78= 3.45+5.75= 3.40+58.20= 49.80+49.20= 111.6-99= 7.8+21.02= 5.6-1.42= 12.5+0.9= 4.5-2.83= 3.75+2.25= 2.98+0.56= 12.53+4.67= 6.07+4.89= 5.64-1.78= 10.2-6.45= 5-0.41= 0.3+1.5= 2.5+9.8= 7.6+1.3= 4.4+5.7= 2.3+7.7= 5.7+3.1= 7.69+2.31= 9.16+2.64= 5.68+12.22= 16.8+16.5= 26.3+14.6= 6.9+3.4= 52.3+64.7= 12.75-5.3= 8.24+16.93= 0.75+0.4= 20+0.78= 4.8+4.2= 5.7-3= 4.9-1.7= 1.34+0.8= 2-0.75= 8.7+0.03= 0.2-0.09= 8.5+2.5= 2.4-1.4= 0.68+0.42= 7.82-7.2= 2+9.1= 0.48+0.52= 8.1-5.1= 0.78-0.24= 0.8+0.18= 0.89-0.25= 1-0.98= 0.9+0.1= 1-0.8= 4.5-4= 5.6+4= 10-4.4= 6+6.6= 9.5-2.7= 1-0.55= 3.7+4.8= 7+3.3= 3.25+0.75= 2.7+3.9=