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Sagot :

Bonjour,

A = 1/2 - 3/4 x 16/9

A = 1/2 - 48/36

A = (1 x 18) / (2 x 18) - 48/36

A = 18/36 - 48/36

A = - 30/36

A = (6 x - 5) / (6 x 6)

A = - 5/6

B = 1/5 - 3/10 x 1/6 + 3/2

B = 1/5 - 3/60 + 3/2

B = (1 x 12) / (5 x 12) - 3/60 + (3 x 30) / (2 x 30)

B = 12/60 - 3/60 + 90/60

B = 99/60

B = (3 x 33) / (3 x 20)

B = 33/20

C = (1/5 - 3/10) x (1/6 + 3/2)

C = [(1 x 2) / (5 x 2) - 3/10] x [1/6 + (3 x 3) / (2 x 3)]

C = (2/10 - 3/10) x (1/6 + 9/6)

C = - 1/10 x 10/6

C = - 10/60

C = (10 x - 1) / (10 x 6)

C = - 1/6.

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