来自郭建青的问题
简便方法计算.312÷4+360×25%+0.25×36.5;(7.25×40%+2.75×25)÷20%;[1.9+19%×(4.8-345)]÷(2910-190%)
简便方法计算.
312÷4+360×25%+0.25×36.5;
(7.25×40%+2.75×25)÷20%;
[1.9+19%×(4.8-345)]÷(2910-190%)


简便方法计算.312÷4+360×25%+0.25×36.5;(7.25×40%+2.75×25)÷20%;[1.9+19%×(4.8-345)]÷(2910-190%)
简便方法计算.
312÷4+360×25%+0.25×36.5;
(7.25×40%+2.75×25)÷20%;
[1.9+19%×(4.8-345)]÷(2910-190%)
(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...