Réponse :
Explications étape par étape
5 ÷ 2 = 5 × x
⇔ x = (5/2) / 5
⇔ x = 0,5
5 ÷ 2 = 5 × 0,5
10 ÷ 4 = 10 × x
⇔ 5/2 = 10 × x
⇔ x = (5/2) / 10
⇔ x = 5/20
⇔ x = 1/4
10 ÷ 4 = 10 × 0,25
10 ÷ 2 = 10 × x
⇔ 5 = 10 × x
⇔ x = 5 / 10
⇔ x = 1/2
10 ÷ 2 = 10 × 0,5
5 ÷ 3 = 5 × x
⇔ (5/3) / 5 = x
⇔ x = 5/3 × 1/5
⇔ x = 5/15
⇔ x = 1/3
5 ÷ 3 = 5 × 1/3
5 ÷ 6 = 5 × x
⇔ ( 5 / 6 ) / 5 = x
⇔ x = 5/6 × 1/5
⇔ x = 5/30
⇔ x = 1/6
5 ÷ 6 = 5 × 1/6
3/4 ÷ 2/3 = 3/4 × x
⇔ 3/4 × 3/2 = 3/4 × x
⇔ 9/8 = 3/4 × x
⇔ x = (9/8) / (3/4)
⇔ x = 9/8 × 4/3
⇔ x = 36/ 24
⇔ x = 3/2
3/4 ÷ 2/3 = 3/4 × 3/2
ou directement : (a/b) / (c/d) = ( a/b) * (d/c) définition
3/4 ÷ 2/3 = 3/4 × 3/2
