题目内容
| 2.3×0.3= | 0.42×O.2= | 3.5×0.2= |
| 12×0.2= | 1.8×0.5= | 0.9×0.11= |
| 1.22×0.4= | 0.12×0.6= | 0.02×500= |
分析:小数乘法的计算方法:按照整数乘法的法则算出积,再看因数中一共有几位小数,就从得数的右边起数出几位,点上小数点;据此计算得解.
解答:
| 解: 2.3×0.3=0.69, |
0.42×O.2=0.084, |
3.5×0.2=0.7, |
| 12×0.2=2.4, | 1.8×0.5=0.9, | 0.9×0.11=0.099, |
| 1.22×0.4=0.488, | 0.12×0.6=0.072, | 0.02×500=10. |
点评:此题考查小数乘法的计算方法的灵活运用,要注意积的小数位数等于两个因数的小数位数之和,还要注意得数的小数部分末尾有0,一般要把0去掉进行化简.
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