Răspuns :

Andreutsa10id

a) (-3/2)+5/6=

-9/6+5/6=

-4/6=-2/3

b) (-2/3)-3/4=

-8/12-9/12=-17/12

c)5/6+3/8=

20/24+9/24= 29/24

d) 4/9-6/7=

28/63-54/63= -26/63

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