最好能写过程吧、、、
问题描述:
最好能写过程吧、、、
45+(-30)
-1/4-(-1/2)
-40-28-(-19)+(-24)
(2/3-1/2)-(1/3-5/6)
(-6/13)+(7/13)-(-2)
11+(-22)-3X(-11)
(-34)X(-2/3-1/3)X0
(-2)的3乘方—3的2乘方
(3/4-7/8)÷(-7/8)
1-2+3-4+5-6+……+99-100
答
45+(-30)=45-30=15-1/4-(-1/2)=-1/4+1/2=-1/4+2/4=1/4-40-28-(-19)+(-24)=-40-28+19-24=-73(2/3-1/2)-(1/3-5/6)=(4/6-3/6)-(2/6-5/6)=1/6-(-3/6)=1/6+3/6=4/6=2/3(-6/13)+(7/13)-(-2)=-6/13+7/13+2...