(-12)*(-一有三分之四) 5/6*(-0.2) 12.*(-1.35)*(-40)*2-1-(-11/2)*(-4/11) (-5)/(-15)/(-3)
问题描述:
(-12)*(-一有三分之四) 5/6*(-0.2) 12.*(-1.35)*(-40)*2
-1-(-11/2)*(-4/11) (-5)/(-15)/(-3)
答
=11 12x=11+11 12x=22 x=11/6 10分之7+X+2分之1=8分之15 两边两边乘30 24-30x+10=25 30x=34-25 x=3/10 X-(2/3+1/4)=
答
(-12)*(-一又4分之3)
=12×7/4
=21
5/6*(-0.2)
=-5/6×1/5
=-1/6
12.*(-1.35)*(-40)*2
=-13.2×1600
=-25920
-1-(-11/2)*(-4/11)
=-1-11/2×4/11
=-1-2
=-3
(-5)/(-15)/(-3)
=-1/3÷3
=-1/9