题目内容
| 0.7+0.3= | 0.52+0.48= | 0.5×5= | 7÷100= |
| 1.8-0.4= | 1-0.65= | 0.04×1000= | 0.07÷2= |
分析：根据小数加减乘除的计算方法进行计算．
解答：解：
| 0.7+0.3=1 | 0.52+0.48=1 | 0.5×5=2.5 | 7÷100=0.07 |
| 1.8-0.4=1.4 | 1-0.65=0.35 | 0.04×1000=40 | 0.07÷2=0.035． |
点评：口算时，注意运算符号和数据，然后再进一步计算．
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