| d) | Calcul rapidement. |
| –
9 – 6 = |
– 15 |
–
39 + 48 = |
9 |
–
26 + 29 = |
3 |
| –
9 + 6 = |
–
3 |
–
26 + 7 = |
–
19 |
–
29 – 26 = |
–
55 |
| –
6 + 9 = |
3 |
–
19 – 21 = |
–
40 |
+26
+ 29 = |
55 |
| –
9 – 9 = |
–
18 |
–
13 + 12 = |
–
1 |
26
– 29 = |
–
3 |
| –
9 + 9 = |
0 |
4
– 23 = |
–
19 |
–
9 – 26 = |
–
35 |