Bonjour,
exercice 1
a)
0,8 -4,8 = -4
b)
-4,5 +2 = -2,5
c)
-7+4 = -3
d)
6,5 -18,5 = -12
e)
23 + 24 = 47
f)
-14+8 = -6
g)
6-15 = - 9
h)
9 -28 = -19
i)
31-5+ 6 = 32
j)
79 - 59 = 20
Exercice 2
-1,3 ;-1-0,9 ; -0,8; -0,7; -0,2; +0,6; +1;
Exercice 3
a)
29/25
b)
12/9 = 4/3
c)
3/12 -1/12 = 2/12 = 1/6
d)
2/12 - 24/12 = -22/12 = - 11/6
e)
6/10 +7/10 = 13/10
f)
7/8 +6/8 - 44/8 = -31/8
exercice 4
a= 3/4
b = 6/13
c= 17/11
28/35 et 36/45
35*45 = 1575
28 *45 = 1260
28/35 = 1260/1575
36 * 35 = 1260
36/45 = 1260/1575
Elles sont bien égales
