bonjour
Exercice 1
4³ = 4*4*4 = 64
0²³ = 0
( - 0.6)² = ( -0.6)(-0.6) = 0.36
- 4.7 x 10⁵ = - 470 000
2 ⁻³ = 1/2³ = 1/8
le produit de 5 facteurs égaux à - 3 = ( -3)⁵
mille = 10³
milliards = 10⁹
mille = 10³
millions = 10 ⁶
mille = 10 ³
donc 10 ³ * 10 ⁹*10³ * 10⁶ * 10³ = 10 ²⁴
0.42 * 10⁵ = 42 000 = 4.2 * 10⁴
Exercice 2
ABCDE = 3 + 3 + 1.5 + 1.5 = 8 cm
si ab = 8 cm
périmètre = 8 + 8 + 4 + 4 + 4 = 28 cm
CD = x
AB = 2 x
ABCDE = x + x + 0.5 x + 0.5 x = 3 x
exercice 3
lundi = 6 ⁸ personnes
mardi = 6 ⁸ x 6 = 6 ⁹
mercredi = 6⁹ x 6 = 6¹⁰
jeudi = 6 ¹⁰ x 6 = 6 ¹¹
vendredi = 6 ¹¹ x 6 = 6 ¹²
dimanche = 6 ⁸ - 6 = 6 ⁷
