题目内容
用递等式计算,能简便计算的要简便计算。
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| (1)0.034×12.5×0.8 =0.034×(12.5×0.8) =0.034×10 =0.34 |
(2)100.4×1.9﹣1.9×0.4 =(100.4-0.4)×1.9 =100×1.9 =190 |
| (3)25.8+3.76×0.25 =25.8+0.94 =26.74 |
(4)101×0.45 =(100+1)×0.45 =100×0.45+1×0.45 =45.45 |
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