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Sagot :

Réponse :

bonsoir

Explications étape par étape

a. (3-2/3)  / 4/3 x7

=9/3 -2/3  / 28/3

= 7/3  / 28/3

=7/3x3/28

=1/4

b. (2/3)/(5/6) - 2/5

=2/3 x 6/5  - 2/5

=4/5  - 2/5

=2/5

c. (-3/4+1/2)  / (2/5-5/2)

-1/4 / -21/10

=-1/4 x -10/21

=10/84

= 5/42

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