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Réponse :

Explications étape par étape

Bonjour

Multiplier :

4/6 x 7/3 = (2 x 2)/(2 x 3) x 7/3

4/6 x 7/3 = 2/3 x 7/3

4/6 x 7/3 = (2 x 7)/(3 x 3)

4/6 x 7/3 = 14/9

Additionner :

4/6 + 7/3 = (2 x 2)/(2 x 3) + 7/3

4/6 + 7/3 = 2/3 + 7/3

4/6 + 7/3 = (2 + 7)/3

4/6 + 7/3 = 9/3

4/6 + 7/3 = (3 x 3)/3

4/6 + 7/3 = 3

3) 4/7 x 7/13 = 7/7 x 4/13

4/7 x 7/13 = 4/13

4) 4/8 + 7/12 = (4 x 1)/(2 x 4) + 7/12

4/8 + 7/12 = 1/2 + 7/12

4/8 + 7/12 = (1 x 6)/(2 x 6) + 7/12

4/8 + 7/12 = 6/12 + 7/12

4/8 + 7/12 = (6 + 7)/12

4/8 + 7/12 = 13/12

5) 4/8 / 7/3 = 4/8 x 3/7

4/8 / 7/3 = (1 x 4)/(2 x 4) x 3/7

4/8 / 7/3 = 1/2 x 3/7

4/8 / 7/3 = (1 x 3)/(2 x 7)

4/8 / 7/3 = 3/14

6) 3/4 / 2 = 3/4 x 1/2

3/4 / 2 = 3/8

7) 5/8 / 3 = 5/8 x 1/3

5/8 / 3 = 5/24

8) 2/9 - 2/5 = (2 x 5)/(9 x 5) - (2 x 9)/(5 x 9)

2/9 - 2/5 = 10/45 - 18/45

2/9 - 2/5 = -8/45

9) 3/7 + 2 = 3/7 + 14/7

3/7 + 2 = 17/7

10) 7/13 x 6 = 42/13