- | 1÷ ÷1 | + | × |
1÷![]() | 2-2÷2 | 7- - | ÷ ÷ × |
×![]() | 101×99 | 100×0.1% | × ×8 |
| 100×10% | 20× × | 4.8×50% | 0.125×16÷2. |
- = , | 1÷ ÷1=4, | + = , | × = , |
1÷![]() =2 , | 2-2÷2=1, | 7- - =6, | ÷ ÷ × =1, |
× = , | 101×99=9999, | 100×0.1%=0.1, | × ×8= , |
| 100×10%=10, | 20× × = , | 4.8×50%=2.4, | 0.125×16÷2=1. |
分析:根据分数和小数加减乘除的计算方法进行计算即可.
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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÷1
+
×

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÷
÷
×
×8
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