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Sagot :

Bonjour,

1) (57 + 43 + 25 + 38 + 47) : 5 = 210 : 5 = 42

2) [(15 x 2) + (18 x 4) + 12] : 7 = (30 + 72 + 12) : 7 = 16,28

3) [(5 x 14) + (8 x 18) + (7 x 20)] : (5 + 8 + 7) = (70 + 144 + 140) : 20 = 284 : 20 = 14,2 .

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