用简便方法计算(要过程)0.625X0.5+8分之5+2分之1X62.5% 22X4分之3+25X75-7X0.7549.5x10又5分之3-(50-2分之1)X60% 4-【(4分之1+75%)除以1又8分之3】X5又7分之1

问题描述:

用简便方法计算(要过程)
0.625X0.5+8分之5+2分之1X62.5% 22X4分之3+25X75-7X0.75
49.5x10又5分之3-(50-2分之1)X60%
4-【(4分之1+75%)除以1又8分之3】X5又7分之1

0.625X0.5+8分之5+2分之1X62.5% = 0.625X0.5+0.625+0.5X0.625=0.625×(0.5+1+0.5)=0.625×2=1.25 22X4分之3+25X75-7X0.75=22X0.75+2500X0.75-7X0.75=0.75×(22+2500-7)=0.75×2515=1886.2549.5x10又5分...