Sagot :
Bonjour,
2/3 de 15 = 2/3 × 15 = (2 × 15) / 3 = 30/3 = 10
4/5 de 35 = 4/5 × 35 = (4 × 35) / 5 = 140/5 = 28
2/3 × 3/2 = 1
(5/7)/(2/3) = 5/7 × 3/2 = 15/14
(7/3)/(14/9) = 7/3 × 9/14 = 63/42 = 3/2
bonjour
2/3 * 15 = 30/3 = 10
4/5 * 35 = 140/5 = 28
2/3 * 3/2 = 6/6 = 1
5/7 : 2 /3 = 5/7 * 3/2 = 15/14
7/3 : 14/9 = 7/3 * 9/14 = 63/42 = 3 /2
je reprends les puissances fausses
10⁵ * 10² * 10 ⁶ = 10 ¹³
10 * 10 ⁻² * 10 ³ = 10 ²
10³ / 10 ⁶ = 10 ⁻³
10⁴ = 10 ⁻² = 10 ⁶
32 * 10 ⁴ = 3.2 * 10⁵
0.056 45 = 5.645 * 10 ⁻²