99又7⼀8乘括号-4剪扩号1⼀2减1⼀3-5⼀6括号乘24

2024-12-01 17:12:00
推荐回答(1个)
回答1:

99又7/8×(-4)-(1/2-1/3-5/6)×24
=(100-1/8)×(-4)-(1/2×24-1/3×24-5/6×24)
=(-100×4+1/8×4)-(12-8-20)
=-400+1/2+16
=-383.5