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-

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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-

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-
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

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-
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=1/13+2=27/13
11+(-22)-3X(-11)=11-22-(-33)=11-22+33=22
(-34)X(-2/3-1/3)X0=(-34)*(-1)*0=0
(-2)的3乘方—3的2乘方=-8-9=-17
(3/4-7/8)÷(-7/8)=(6/8-7/8)÷(-7/8)=-1/8÷(-7/8)=-1/8*(-8/7)=1/7
1-2+3-4+5-6+……+99-100=(1+3+5+...+99)-(2+4+6+...+100)=(1+3+5+...+99)-[(1+1)+(3+1)+(5+1)+.+(99+1)]=(1+3+5+...+99)-[(1+3+5+.+99)+1*100/2]=-50