Задания 540 задания 548

Question

Задания 540
задания 548

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Answer 1

1. -4/5*5/12=-1/3
-1/3*(-3/8)=1/8
2. -9/10*(-2/3)=3/5
3/5*5/6=3/6=1/2
3. -7/8*(-24/35)=3/5
3/5*(-5/6)=-1/2
-1/2-1/2=-0,5-0,5=-1
4.-25/44*22/45=-5/2*1/9=-5/18
-5/18*63/100=-1/2*7/20=-7/40
-7/40+7/40=0