Réponse :A = 25 × [(17 + 9) × 2 + 4]
A = 25 × [26 × 2 + 4]
A = 25 × [52 + 4]
A = 25 × 56
A = 1400
B = 120 − 15 × (21 − 18)
B = 120 − 15 × 3
B = 120 − 45
B = 75
C = 13 − 4 × 3 + 2
C = 13 − 12 + 2
C = 1 + 2
C = 3
Explications étape par étape :
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Réponse :A = 25 × [(17 + 9) × 2 + 4]
A = 25 × [26 × 2 + 4]
A = 25 × [52 + 4]
A = 25 × 56
A = 1400
B = 120 − 15 × (21 − 18)
B = 120 − 15 × 3
B = 120 − 45
B = 75
C = 13 − 4 × 3 + 2
C = 13 − 12 + 2
C = 1 + 2
C = 3
Explications étape par étape :