Bonjour,
1)
11/3 = 33/9
8/12 = 2/3
4 x 7/4 = 7
2)
7/6 + 5/3 = 7/6 + 10/6 = 17/6
1/6 - 1/4 = 2/12 - 3/12 = - 1/12
2/9 + 3/7 = 14/63 + 27/63 = 41/63
11/6 x - 12/5 = -132/30 = - 22/5
7/- 8 x - 1/4 = 7/32
12 x 3/5 = 36/5
11/6 : 12/5 = 11/6 x 5/12 = 55/72
2/3 : 5/6 = 2/3 x 6/5 = 12/15 = 4/5
2 - 3/7 = 14/7 - 3/7 = 11/7
3)
L'inverse de 2/5 est 5/2
L'inverse de - 1/7 est - 7
L'inverse de 13 est 1/13.
4)
1 - 2/3 = 3/3 - 2/3 = 1/3
Il restera 1/3 du chocolat
1/3 x 100 = 100/3 = 33,33 g de chocolat restant
5)
24/36 = 2/3
15/45 = 1/3
56/28 = 2.
