Sagot :
Réponse:
1/2 + 2/3
=3/6 + 2/6
= 5/6
3/5 - 2/7
=21/35 - 10/35
=11/35
-3/11 + 1/2
= -6/22 + 11/22
= 5/22
-3/4 + -1/5
=-15/20 + -4/20
= -19/20
Réponse:
1/2 + 2/3
=3/6 + 2/6
= 5/6
3/5 - 2/7
=21/35 - 10/35
=11/35
-3/11 + 1/2
= -6/22 + 11/22
= 5/22
-3/4 + -1/5
=-15/20 + -4/20
= -19/20