負數的題目

求下列的答案:

1.(-36)+(-9)-(-18)=-27
2.(-8)x(-2)x(+3)=48
3.(+3)除(-7)除(+七分之一)=-3

請解下列方程
1.x-10=-8, x= -8+10 = 2
2.2x+5=-11, x= (-11-5)/2 = -8
3.二分之3x=八份之九, x=((9/8)(2/3) = 3/4
4.12+3x=4-5x, 3x+5x=4-12, 8x=-8, x=-1

1.-37
2.48
3.-3


1.x-10=-8
x=-8+10
x=2

2.2x+5=-11
2x=-16
x=18

3.4份之3

4.12+3x=4-5x
3x+5x=4-12
8x =-8
x =-1

2007-08-20 19:33:55 補充：
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