Question

第四题，计算

Answer 1

四（3）计算：
-5/2X(-1/2)X(-2/绝毕咐5)X(-3/4)=3/8；并纯数闷
(-0.125)X1/2)X(-24)=(-1/8)X(1/2)X(-24)
=3/2；
(-7)X(-1+3/28-1/7)=7-3/4+1
=8-3/4
=7又4分之1。

Answer 2

1、3/8
2、原式=-9/7×7/3+15/凯笑14×7/3
=-3+5/2
=-1/2
3、原式=1/8×1/2×8×3
=3/2
=1又1/2
4、原式=7×1-7×3/28+7×1/7
=7-3/4+1
=8-3/4
=7+1/4
=7又御羡1/镇孙拍4