c) | Ecris la différence sans parenthèses, puis calcule. |
(+
5) – (– 4) = |
5
+ 4 = |
9 |
42
– (– 4) = |
42
+ 4 = |
46 |
(–
9) – (– 5) = |
–
9 + 5 = |
–
4 |
–
21 – (+ 14) = |
–
21 – 14 = |
–
35 |
(–
17) – (+ 2) = |
–
17 – 2 = |
–
19 |
–
8 – (– 5) = |
–
8 + 5 = |
–
3 |
(+
2) – (– 7) = |
2
+ 7 = |
9 |
(–
12) – (– 7) = |
–
12 + 7 = |
–
5 |
(–
17) – (– 9) = |
–
17 + 9 = |
–
8 |
–
21 – (– 30) = |
–
21 + 30 = |
9 |