Question

简便方法：1. 8分之7*4分之1+0.25*0.125 2. 15分之2*[12.6-(5分之33+0.125/12.56%）] （/ 是除号）

Answer 1

1. 8分之7*4分之1+0.25*0.125
=(7/8)*(1/4)+(1/4)*(1/8)
=(1/4)(7/8+1/8)
=1/4
2. 15分之2*[12.6-(5分之33+0.125/12.56%）]
=(2/15)*12.6-(2/15)*(33/5)-(2/15)*0.125/0.1256
=1.68-0.88-0.13
=0.8-0.13
=0.67
=

Answer 2

1、7/8×1/4＋0.25×0.125
＝7/8×1/4＋1/4×1/8
＝(7/8＋1/8)×1/4
＝1×1/4
＝1/4

2、2/15×[12.6－(33/5＋0.125/12.56％)]
第2题是这样吗，你看看有没有打错题目。