用简便方法计算399×101402×25+98×25125×32×0.253.78+[6.5-(3.5+
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解决时间 2021-03-02 13:36
- 提问者网友:愿为果
- 2021-03-01 21:55
用简便方法计算399×101402×25+98×25125×32×0.253.78+[6.5-(3.5+
最佳答案
- 五星知识达人网友:雾月
- 2021-03-01 22:49
(1)399×101, =399×(100+1), =39900+399, =40299; (2)402×25+98×25, =(402+98)×25, =500×(20+5), =10000+2500, =12500; (3)125×32×0.25, =125×8×4×0.25, =(125×8)×(4×0.25), =1000×1, =1000; (4)3.78+[6.5-(3.5+2)], =3.78+[6.5-3.5-2], =3.78+1, =4.78. |
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