maths 5 eme bonjour. svppppp. merci​

Réponse :

bonjour

17/12 + 3/4 + 9/2

= 17/12 + 9/12 + 54/12

= 80/12

=  20/3

4/5 - 2/15 + 1/3

= 12/15 - 2/15 + 5/15

= 15/15

= 1

5/8 + ( 19/24 - 1/3 )

= 5/8 + ( 19/24 - 8/24 )

= 5/8 + 11/24

= 15/24 + 11 /24

= 26/24

= 13/12

Explications étape par étape :