Answers

2016-07-22T23:12:42+08:00
1. (-5)×(-2)×(4)=40
-5×-2=10×4=40
2. (-4)×(-1)×(15)=60
-4×-1=4×15=60
3.(-4)×(-20)=(16)×(5)
-4×-20=80
16×5=80
4.(0)×(-5)=(-90)×(0)
0×-5=0
-90×0=0
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