Réponse :
Explications étape par étape
Bonsoir
7/10 + 1/10
= 8/10
= 4/5
= 0,8
7/4 - 1/4
= 6/4
= 3/2
= 1,5
3/7 + 2/7
= 5/7
~ 0,714...
Calculer et simplifier :
7/15 + 3/15
= 10/15
= (2 x 5)/(3 x 5)
= 2/3
5/8 - 1/8
= 4/8
= 4/(2 x 4)
= 1/2
7/9 - 1/9
= 6/9
= (2 x 3)/(3 x 3)
= 2/3
2/10 + 3/10
= 5/10
= 5/(2 x 5)
= 1/2
5/6 - 1/6
= 4/6
= (2 x 2)/(2 x 3)
= 2/3
7/12 - 1/12
= 6/12
= 6/(2 x 6)
= 1/2