Réponse:
bonjour
Explications étape par étape:
8. a. 360 ÷ 2 = 180
180 ÷ 2 = 90
90 ÷ 2 = 45
45 ÷ 3 = 15
15 ÷ 3 = 5
5 ÷ 5 = 1
2 × 2 × 2 × 3 × 3 × 5 = 360
b. 2³ × 3² × 5² = 1800 (360 × 5 = 1800)
2⁴ × 3² × 5 × 7 = 5040 (360 × 14 = 5040)
9. a. 42 ÷ 2 = 21
21 ÷ 3 = 7
7÷7 = 1
2 × 3 × 7 = 42
70 ÷ 2 = 35
35 ÷ 5 = 7
7÷7 = 1
2 × 5 × 7 = 70
