Bonjour, pouvez-vous m’aider sur l’exercice de calcul n*2

Bonsoir,

7/3 + 5/12
= (7 x 4)/(3 x 4) + 5/12
= 28/12 + 5/12
= 33/12
= (11 x 3)/(4 x 3)
= 11/4

5/6 + 7/3
= 5/6 + (7 x 2)/(3 x 2)
= 5/6 + 14/6
= 19/6

3/2 + 1/4 - 3/8
= (3 x 4)/(2 x 4) + (1 x 2)/(4 x 2) - 3/8
= 12/8 + 2/8 - 3/8
= 11/8

3/4 + 5/6
= (3 x 6)/(4 x 6) + (5 x 4)/(6 x 4)
= 18/24 + 20/24
= 38/24
= (19 x 2)/(12 x 2)
= 19/12

3 + 2/3 + 4/9
= (3 x 9)/(1 x 9) + (2 x 3)/(3 x 3) + 4/9
= 27/9 + 6/9 + 4/9
= 37/9

2 + 1/10 + 7/100
= (2 x 100)/(1 x 100) + (1 x 10)/(10 x 10) + 7/100
= 200/100 + 10/100 + 7/100
= 217/100