| e) | Utilise la rèfgle pour calculer les sommes suivantes. |
| (+
7) + (– 3) = |
+
4 |
(+
25) + (– 10) = |
+
15 |
(+
17) + (– 20) = |
–
3 |
| (–
8) + (– 2) = |
–
10 |
(–
10) + (– 25) = |
–
35 |
(–
20) + (– 17) = |
–
37 |
| (+
9) + (+ 3) = |
+
12 |
(–
17) + (+ 10) = |
–
7 |
(–
2) + (+ 19) = |
+
17 |
| (+
5) + (– 2) = |
+
3 |
(–
28) + (– 3) = |
–
31 |
(+
8) + (+ 17) = |
+
25 |
| (–
4) + (– 9) = |
–
13 |
(+
17) + (– 22) = |
–
5 |
(+
5) + (– 14) = |
–
9 |