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Sagot :

Réponse :

Bonsoir

Exercice 1

1) 7,8 + 6 ÷ 2 = 7,8 + 3 = 10,8

2) (6 × 5)/(4 + 2 × 3) = 30/(4 + 6) = 30/10 = 3

3) 15 - (17 - (30 - 2 × 10)) = 15 - (17 - (30 - 20)) = 15 - (17 - 10) = 15 - 7 = 8

Exercice 2

1) 40 ÷ (5 - 3) = 20

2) (4 + 6) × 3 = 30

Exercice 3

Le nombre de petits bouquets se calcule par :

(739 - (30 × 12) - 4)/5

Il y  a donc :

(739 - 360 - 4)/5 = (379 -4)/5 = 375/5 = 75 petits bouquets

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