简便方法计算.
3
÷4+360×25%+0.25×36.5;
(7.25×40%+2.75×
)÷20%;
[1.9+19%×(4.8-3
)]÷(2
-190%)
人气:215 ℃ 时间:2019-11-13 01:33:01
解答
(1)312÷4+360×25%+0.25×36.5=3.5×14+360×0.25+0.25×36.5=3.5×0.25+360×0.25+0.25×36.5=(3.5+36.5+360)×0.25=400×0.25=100;(2)(7.25×40%+2.75×25)÷20%=(7.25×40%+2.75×40%)÷20%=(7.25+2...
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