题目内容
口算.
3.2×0.2 | 1.4×0.4 | 3.3÷3 | 1.2÷0.3 | 5.6÷0.4 |
2.5×0.4 | 1.5×2 | 7.3+2.7 | 8.4÷0.7 | 4.5÷0.9 |
0.53-0.3 | 7.8÷6 | 8.4÷0.21 | 0.6×0.5 | 8.1×2 |
5.6+3.6 | 9-2.35 | 0.56÷8 | 1.23×3 | 12.5÷0.1. |
分析:根据小数加减乘除的计算方法进行计算即可.
解答:解:
3.2×0.2=0.64, | 1.4×0.4=0.56, | 3.3÷3=1.1, | 1.2÷0.3=4, | 5.6÷0.4=14, |
2.5×0.4=1, | 1.5×2=3, | 7.3+2.7=10, | 8.4÷0.7=12, | 4.5÷0.9=5, |
0.53-0.3=0.23, | 7.8÷6=1.3, | 8.4÷0.21=40, | 0.6×0.5=0.3, | 8.1×2=16.2, |
5.6+3.6=9.2, | 9-2.35=6.65, | 0.56÷8=0.07, | 1.23×3=3.69, | 12.5÷0.1=125. |
点评:口算时,注意运算符号和数据,然后再进一步计算即可.

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口算.
3.2×0.2 | 1.4×0.4 | 3.3÷3 | 1.2÷0.3 | 5.6÷0.4 |
2.5×0.4 | 1.5×2 | 7.3+2.7 | 8.4÷0.7 | 4.5÷0.9 |
0.53-0.3 | 7.8÷6 | 8.4÷0.21 | 0.6×0.5 | 8.1×2 |
5.6+3.6 | 9-2.35 | 0.56÷8 | 1.23×3 | 12.5÷0.1. |