(-1)*(-6)-(-7)*(+6)
问题描述:
(-1)*(-6)-(-7)*(+6)
(3/4)*(1/2-4+2又2/3)
-3-(-1)*(-1又1/4)
0-(-7/12)*(-15)*(2*3-6)
(-100)*(3/10-1/2+1/5-0.1)
(-3.59)*(-4/7)-2.41*(-4/7)+6*(-4/7)
|-2又1/2|-(-2.5)+1-|1-2又1/2|
3(x-2)=x-(7-8x)
1/3(1-2x)=2/7(3x+1)
(x+2)/4-(2x-3)/6=1
x-(x-1)/2=2-(x+1)/3
(1/2)x-2y=7
(1/2)x-3y=-8
2a-3b=-1
3a=6b=16
2x<3-(x+1)/2
2x+5>0
(x-1)/2>x/3
5x-2<3x+4
(x+8)/3>-x
x+y=8
y+z=3
z+x=-1
答
(-1)*(-6)-(-7)*(+6)=6+42=48(3/4)*(1/2-4+2又2/3)=3/4*(-5/6)=-5/8 -3-(-1)*(-1又1/4)=-3-5/4=4又1/4 0-(-7/12)*(-15)*(2*3-6)=7/12*(-15)*0=0(-100)*(3/10-1/2+1/5-0.1)=-100*(-0.1)=10(-3.59)*(-4...