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Sagot :

B= 7/4 + 25/20. B= 7*5/4*5 + 25/20= 35/20 + 25/20=60/20. Ensuite tu prends exemple
KLEI

C = 35/49 - 6/14

C = 5/7 - 3/7

C = 5-3/7

C = 2/7

D = 21/18 - 14/12

D = 7/6 - 7/6

D = 0

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