Sagot :
1. 6 + 5 = 5 + 6
2. (9 × 2) × 4 = 9 × (2 × 4)
3. (1 × 4) × 0 = 4 × (1 × 0)
4. 17 + 19 = 19 + 17
5. (13 + 6) + 7 = 13 + (7 + 6)
1. 6 + 5 = 5 + 6
2. (9 × 2) × 4 = 9 × (2 × 4)
3. (1 × 4) × 0 = 4 × (1 × 0)
4. 17 + 19 = 19 + 17
5. (13 + 6) + 7 = 13 + (7 + 6)