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7.Efectuati:
a) (-8/21):4/7 =
b)2/3:(-7/5) =
c)-12/7(-3/4) =
d)7/15:(-14) =
e)1:(-2/5) =

VA MULTUMESC

Răspuns :

(-8/21):4/7 = (-8/21)*7/4 = -2/3
2/3:(-7/5)  = -2/3*5/7=-10/21
-12/7(-3/4) = 3/7*3=9/7
7/15:(-14) = -1/15*1/14 = -1/15*1/2=-1/30
1:(-2/5) = -1:2/5=-5/2

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