题目内容
口算: 2÷5= | 8.8+0.12= | 8.8+1.2= | 0.36×5= | 9.7-0.97= |
1.2×0.5= | 9.5÷0.95= | 0.45+0.55= | 0.7-0.07= | 0.125×8= |
解:2÷5=0.4; 8.8+0.12=8.92; 8.8+1.2=10; 0.36×5=1.8; 9.7-0.97=8.73;
1.2×0.5=0.6; 9.5÷0.95=10; 0.45+0.55=1; 0.7-0.07=0.63; 0.125×8=1;
故答案为:0.4,8.92,10,1.8,8.73,0.6,10,1,0.63,1.
分析:①2除以5,在2后添0补足数位,再相除;②③⑤⑧⑨注意数位对齐;④⑥⑩先算整数乘整数,然后在得数中从后向前数出有几位小数,点上小数点即可;⑦把被除数和除数分别扩大100倍,再相除.
点评:此题考查了小数的加、减、乘、除运算,掌握方法是解答的关键.
1.2×0.5=0.6; 9.5÷0.95=10; 0.45+0.55=1; 0.7-0.07=0.63; 0.125×8=1;
故答案为:0.4,8.92,10,1.8,8.73,0.6,10,1,0.63,1.
分析:①2除以5,在2后添0补足数位,再相除;②③⑤⑧⑨注意数位对齐;④⑥⑩先算整数乘整数,然后在得数中从后向前数出有几位小数,点上小数点即可;⑦把被除数和除数分别扩大100倍,再相除.
点评:此题考查了小数的加、减、乘、除运算,掌握方法是解答的关键.
练习册系列答案
相关题目
口算 1.2÷0.2= | 2.5×4= | 0.25+4= | 1.87×0= |
3.5+0.5= | 1.2÷0.4= | 3.6÷4= | 0÷1.25= |
0.12×6= | 0.64×0.03= | 5.8+4.2-6.5= | 7.8÷3= |
0.125×8= | 2.8÷1.4= | 0.25÷0.5= | 7.21÷7= |
0.35÷10= | 3.6÷3= | 6.3÷0.9= | 0.54÷6= |
0.3×0.1= | 1.3÷2= | 0.4÷8=2 | 7.3÷3= |
0.51÷0.3= | 15÷0.01= | 5÷10= | 0.7×12= |
0.2×0.5= | 3.8×0.1= | 0.2×0.2= | 0.04×0.4= |
12.4+7.6= | 8×0.5= | 0.72÷36= | 9×2.5+2.5= |
1.8÷3= | 2.3÷2= | 6.5÷5= | 2.14÷2= |
2.5×4= | 2.7×2= | 0.5×7= | 4.8+3.6+5.2= |
3.4÷1.7= | 2.5+0.2= | 4.5÷5= | 5+2.8= |
0.8×0.3= | 13.5×2×0= | 5.25÷5= | 4×2.2= |
0.12×0.5= | 1.8×5= | 6.24÷2= | 2.83-1.43= |
1.2+2.9= | 3.8÷2= | 1.32×3= | 4.6×7= |