| g) | Complète chaque case du tableau ci– dessous par un nombre. |
| a |
15 |
8 |
–
2 |
–
3 |
10 |
–
5 |
–
7 |
–
9 |
| b |
7 |
12 |
6 |
–
7 |
–
12 |
+
5 |
+
7 |
–
1 |
| a
+ b |
15
+ 7 = 22 |
8
+ 12 = 20 |
(–
2) + 6 = 4 |
(–
3) + (– 7) = – 10 |
10
+ (– 12) = – 2 |
(–
5) + 5 = 0 |
(–
7) + 7 = 0 |
(–
9) + (– 1) = – 10 |
| a
– b |
15
– 7 = 15 + (– 7) = 8 |
8
– 12 = 8 + (– 12) = – 4 |
(–
2) – 6 = (– 2) + (– 6) = – 8 |
(–
3) – (– 7) = (– 3) + 7 = 4 |
10
– (– 12)= 10 + 12 = 22 |
(–
5) – 5 = (– 5) + (– 5) = – 10 |
(–
7) – 7 = (– 7) + (– 7) = – 14 |
(–
9) – (– 1) = (– 9) + 1 = – 8 |