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

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
=1886.25
49.5x10又5分之3-（50-2分之1）X60%
=49.5*10.6-49.5*0.6
=49.5*（10.6-0.6）
=495
4-【（4分之1+75%）除以1又8分之3】X5又7分之1
=4-【（1/4+3/4）÷1又3/8】X5又1/7
=4-【1÷1又3/8】X5又1/7
=4-【1×8/11】X36/7
=20/77