题目内容
| 0.4×3= | 2.8×5= | 1.7×0.3= | 2.5×4= |
| 0.2×0.5= | 0.4×2.4= | 0.7×9= | 0.4×0.3= |
| 1.25×0.8= | 6×0.4= | 3×0.26= | 0.08×7= |
分析：本题根据小数乘法的运算法则计算即可．
解答：解：
| 0.4×3=1.2 | 2.8×5=14 | 1.7×0.3=0.51 | 2.5×4=10 |
| 0.2×0.5=0.1 | 0.4×2.4=0.96 | 0.7×9=6.3 | 0.4×0.3=0.12 |
| 1.25×0.8=1 | 6×0.4=2.4 | 3×0.26=0.78 | 0.08×7=0.56 |
点评：完成小数乘法算式时要细心，注意小数点位置的变化．
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(5)3.8 －1.5= |
(6)8÷5= |
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(7)0.86 －0.6= |
(8)7.6 ＋2.4= |
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(9)0.63÷7= |
(10)0.6×5= |
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(11)5 －0.5= |
(12)100×0.3= |
口算下面各题
|
(1)0.5 ＋0.4= |
(2)0.26 ＋0.34= |
|
(3)0.07×1000= |
(4)3.2 ÷8= |
|
(5)3.8 －1.5= |
(6)8÷5= |
|
(7)0.86 －0.6= |
(8)7.6 ＋2.4= |
|
(9)0.63÷7= |
(10)0.6×5= |
|
(11)5 －0.5= |
(12)100×0.3= |