Sagot :
Bonjour :)
1) 1/3 + 1/2
= 2/6 + 3/6
= 2 + 3 / 6
= 5/6 => fraction irréductible
Irréductible = qu'on ne peut plus simplifier
2) 3/5 + 7/10
= 6/10 + 7/10
= 6 + 7 / 10
= 13/10 => irréductible
3) 5/6 + 3/4
= 10/12 + 9/12
= 10 + 9 / 12
= 19/12 => irréductible
4) 8/7 + 8/3
= 24/21 + 56/21
= 24 + 56 / 21
= 80/21 => irréductible
5) 2/15 + 1/10
= 4/30 + 3/30
= 4 + 3 / 30
= 7/30 => irréductible
6) 5/6 + 10/9
= 15/18 + 20/18
= 15 + 20 / 18
= 35/18 => irréductible
Bonne soirée :)
Explications étape par étape :
a. 1/3 + 3/2 b. 3/5 + 7 /10 c. 5/6 + 3/4
= 2/6 + 3/6 = 6/10 + 7 /10 = 10/12 + 9/12
= 2 + 3 / 6 = 6 + 7 / 10 = 10 + 9 / 12
= 5/6 = 13/10 = 19/12
d. 8/7 + 8/3 e. 2/15 + 1/10 f. 5/6 + 10/9
= 24/21 + 56 / 21 = 4/30 + 3/30 = 15/18 + 20/18
= 24 + 56 / 21 = 4 + 3 / 30 = 15 + 20 / 18
= 80/21 = 7/30 = 35/18