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51)

42/7 x 55/5 = 2 310/35 = (35 x 66) / (35 x 1) = 66

54/9 x 32/4 = 1 728/36 = (36 x 48) / (36 x 1) = 48.

121/54 x 99/74 x 0 = 0

2 500/100 x 4 = 10 000/100 = 100

Rien ne correspond à 24 est ce un piège ?

52)

a. 2,2/1,5 x 5/4 = 11/6

b. 5,4/6 x 3 = 16,2/6 = 2,7

c. 12/10 x 4 = 48/10 = 4,8.

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