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Sagot :

Bonjour,

Il faut  mettre au même dénominateur:

A)3/8+3/4

= 3/8 +6/8

= 9/8

B) 4/30-1/10

= 4/30 - 3/30

= 1/30

C) 4/5+1

= 4/5 + 5/5

= 9/5

D) 8/3 -1

=8/3 + 3/3

= 11/3

E) 11/13+3

= 11/13 + 39/3

=50/13

F) 3/8+2/6

= 9/24 + 8/24

= 17/24

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