Реши примеры: 3 × 1, 3 × 2, 3 × 3, 3 × 4, 3 × 5, 3 × 6, 3 × 7, 3 × 8, 3 × 9, 3 × 10; 3 × 9, 3 × 4, 3 × 1, 3 × 10, 3 × 7, 3 × 3, 3 × 8, 3 × 2, 3 × 6, 3 × 5.

Используем таблицу умножения на 3.

1. 3 × 1 = 3
2. 3 × 2 = 6
3. 3 × 3 = 9
4. 3 × 4 = 12
5. 3 × 5 = 15
6. 3 × 6 = 18
7. 3 × 7 = 21
8. 3 × 8 = 24
9. 3 × 9 = 27
10. 3 × 10 = 30

Во втором столбике:

1. 3 × 9 = 27
2. 3 × 4 = 12
3. 3 × 1 = 3
4. 3 × 10 = 30
5. 3 × 7 = 21
6. 3 × 3 = 9
7. 3 × 8 = 24
8. 3 × 2 = 6
9. 3 × 6 = 18
10. 3 × 5 = 15