calcul des expressions suivantes: 1+3/7
7-9/2
2+5/3
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7 - 9/2 = 14/2- 9/2 = 6/2 = 3
2 + 5/3 = 6/3+ 5/3 = 11/3
1) 1 + 3/7 =
7/7+3/7 =
=10/7
2) 7 - 9/2 =
14/2- 9/2 =
6/2 =
= 3
3) 2 + 5/3 =
6/3+ 5/3=
= 11/3