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Sagot :

Réponse :

Explications étape par étape

Bonjour

7/3*6/5 -2/7*14/16 -5/-4*2/15 -9/28*56/63

= 6/3 x 7/5 - 14/7 x 2/16 + 2/4 x 5/15 - 9/63 x 56/28

= 2 x 7/5 - 2 x 1/8 + 1/2 x 1/3 - 1/7 x 2

= 14/5 - 2/8 + 1/6 - 2/7

= 14/5 - 1/4 + 1/6 - 2/7

= 98/35 - 3/12 + 2/12 - 10/35

= 88/35 - 1/12

= 1056/420 - 35/420

= 1021/420

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