Bonsoir,
Exercice 29
A
-10/15 - 21/15 = -31/15
B
-9/4 +1/6 = -27/12 + 2/12 = -25/12
C
-15/8 * 3/4 = -45/ 32
D
12/10 *2/3 = 24/30 = 12/15 = 4/5
Exercice 30
2/3 * 3 = 6/3 = 2
B= 2*4/3 = 8/3
C =
2/4 - 1/4 = 1/4
1/4 *4/1 = 4/4 = 1
D =
2/3-1 =2/3 -3/3 = -1/3
2/3 + 1 = 2/3 + 3/3 = 5/3
-1/3 * 3/5 = -3/15 = - 1/5
