(-11又2/3)÷0.5-(21又1/2)÷0.5-(+10又1/3)÷0.5
=[(-11又2/3)-(21又1/2)-(10又1/3)]÷0.5
=[(-11-21-10)+(-2/3-1/2-1/3)]×2
=(42-3/2)×2
=42×2-3/2*×2
=84-3
=81
(-11又2/3)÷0.5-(21又1/2)÷0.5-(+10又1/3)÷0.5
(-11又2/3)÷0.5-(21又1/2)÷0.5-(+10又1/3)÷0.5
简便计算,.
简便计算,.
其他人气：238 ℃时间：2020-05-12 01:03:17
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