题目内容
| 口算下面各题． 0.7×0.9= | 0.14×0.3= | 3.2×0.3= | 0.16×0.5= |
| 7×0.08= | 1.8×0.04= | 60×0.5= | 0.24×3= |
| 7.7×0.03= | 0.12×6= | 2.1×4= | 0.15×0.4= |
解：
| 0.7×0.9=0.63 | 0.14×0.3=0.042 | 3.2×0.3=0.96 | 0.16×0.5=0.08 |
| 7×0.08=0.56 | 1.8×0.04=0.072 | 60×0.5=30 | 0.24×3=0.72 |
| 7.7×0.03=0.231 | 0.12×6=0.72 | 2.1×4=8.4 | 0.15×0.4=0.06 |
分析：根据小数乘法的计算 方法进行解答即可．
点评：在计算小数乘法时要注意：积的小数位数等于两个因数小数位数的和．
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| 0.7+2.8= | 7.3-0.6= | 0.84÷0.2= | 0.12×0= |
| 0.4×0.05= | 0.5÷100= | 5.2+3.8= | 1.45+5.5= |