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
拜托了!
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
拜托了!
45+(-30) =45-30=15
-1/4-(-1/2) = -1/4+1/2=1/2-1/4=1/4
-40-28-(-19)+(-24) = -68+19-24=19-92= -73
(2/3-1/2)-(1/3-5/6) =4/6-3/6-(6/2-6/5)=1/6-(-3/6)=4/6=2/3
(-6/13)+(7/13)-(-2)=7/13-6/13+2=1/13+2=26/13+1/13=27/13
11+(-22)-3X(-11)=11-22-(-33)=11-22+33=22
(-34)X(-2/3-1/3)X0 =0 (任何数乘于0都等于0)
(-2)的3乘方—3的2乘方= (-2)*(-2)*(-2)-(-3)*(-3)= -8-9= -17
(3/4-7/8)÷(-7/8)
1-2+3-4+5-6+……+99-100=(1-2)+(3-4)+.......+(99-100)=-1+-1+......+-1= -50
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)=2/3-1/2-1/3+5/6=4/6-3/6-2/6+5/6=4/6
(-6/13)+(7/13)-(-2)=-6/13+7/13+2=1/13+2=-1/13+26/13=25/13
11+(-22)-3X(-11)=11-22+3x11=-11+33=22
(-34)X(-2/3-1/3)X0=0
(-2)的3乘方—3的2乘方=-2x3-3x2=-12
(3/4-7/8)÷(-7/8)=(6/8-7/8)x(-8/7)=-1/8x(-8/7)=1/7
1-2+3-4+5-6+……+99-100=(1-2)+(3-4)+(5-6)+……+(99-100)=55x(-1)=-55