(1)(-8)x(-7) (2)12x(-5)) (3)9x(-0.40) (4)-30.5x0.5 (5)100x(-0.001) (6)-4.8x(-1.25) 咋做,

问题描述:

(1)(-8)x(-7) (2)12x(-5)) (3)9x(-0.40) (4)-30.5x0.5 (5)100x(-0.001) (6)-4.8x(-1.25) 咋做,

(1)(-7)*(-8)=56
(2)12*(-5)=-60
(3)9*(-0.4)=-3.6
(4)-30.5*0.5=-15.25
(5)100*(-0.001)=-0.1
(6)-4.8*(-1.25)=6