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Sagot :

ANASAG

Réponse:

40/72 -1/9

= 5×8/9×8 -1/9

= 5/9 -1/9

= 4/9

15/35 +2/7

= 5×3/5×7 +2/7

= 3/7 +2/7

= 5/7

5/3 -52/39

= 5/3 - 13×4/13×3

= 5/3 -4/3

= 1/3

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