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A rendre ce soir;
fractions :

1)

C= 1/5 - 13/4

D= 3/2 + 5/10

2)

A= 5/2 x 3/4

B= 6/3 x 5/6

C= 5/2 + 2/7 x 3/4

D= 7/5 ÷ 3/2 + 8/3

Merci d'avance de vos reponses


Répondre :

Bonjour,
C = 4/20 - 65/20
C = -61/20 .

D = 15/10 + 5/10
D = 20/10
= 2 .

A = 15/8

B = 30/18
B = 5/3 .

C = 5/2 + 6/28
C = 70/28 + 6/28
C = 76/28
C = 19/7 .

D = 7/5 × 2/3 + 8/3
D = 14/15 + 8/3
D = 14/15 + 40/15
D = 54/15
D = 18/5 .