Решим примеры на умножение двузначного числа на однозначное.
1. Реши примеры.
- 15 * 6 = (10 + 5) * 6 = 10 * 6 + 5 * 6 = 60 + 30 = 90
- 24 * 4 = (20 + 4) * 4 = 20 * 4 + 4 * 4 = 80 + 16 = 96
- 47 * 2 = (40 + 7) * 2 = 40 * 2 + 7 * 2 = 80 + 14 = 94
- 12 * 7 = (10 + 2) * 7 = 10 * 7 + 2 * 7 = 70 + 14 = 84
- 13 * 2 = (10 + 3) * 2 = 10 * 2 + 3 * 2 = 20 + 6 = 26
- 19 * 4 = (10 + 9) * 4 = 10 * 4 + 9 * 4 = 40 + 36 = 76
- 13 * 8 = (10 + 3) * 8 = 10 * 8 + 3 * 8 = 80 + 24 = 104
- 14 * 2 = (10 + 4) * 2 = 10 * 2 + 4 * 2 = 20 + 8 = 28
- 16 * 5 = (10 + 6) * 5 = 10 * 5 + 6 * 5 = 50 + 30 = 80
2. Реши примеры.
- 18 * 4 = (10 + 8) * 4 = 10 * 4 + 8 * 4 = 40 + 32 = 72
- 12 * 7 = (10 + 2) * 7 = 10 * 7 + 2 * 7 = 70 + 14 = 84
- 34 * 2 = (30 + 4) * 2 = 30 * 2 + 4 * 2 = 60 + 8 = 68
- 16 * 2 = (10 + 6) * 2 = 10 * 2 + 6 * 2 = 20 + 12 = 32
- 48 * 2 = (40 + 8) * 2 = 40 * 2 + 8 * 2 = 80 + 16 = 96
- 25 * 3 = (20 + 5) * 3 = 20 * 3 + 5 * 3 = 60 + 15 = 75
- 21 * 4 = (20 + 1) * 4 = 20 * 4 + 1 * 4 = 80 + 4 = 84
- 23 * 4 = (20 + 3) * 4 = 20 * 4 + 3 * 4 = 80 + 12 = 92
- 35 * 2 = (30 + 5) * 2 = 30 * 2 + 5 * 2 = 60 + 10 = 70
3. Реши примеры.
- 28 * 2 = (20 + 8) * 2 = 20 * 2 + 8 * 2 = 40 + 16 = 56
- 24 * 3 = (20 + 4) * 3 = 20 * 3 + 4 * 3 = 60 + 12 = 72
- 29 * 2 = (20 + 9) * 2 = 20 * 2 + 9 * 2 = 40 + 18 = 58
- 33 * 3 = (30 + 3) * 3 = 30 * 3 + 3 * 3 = 90 + 9 = 99
- 21 * 3 = (20 + 1) * 3 = 20 * 3 + 1 * 3 = 60 + 3 = 63
- 43 * 2 = (40 + 3) * 2 = 40 * 2 + 3 * 2 = 80 + 6 = 86
- 46 * 2 = (40 + 6) * 2 = 40 * 2 + 6 * 2 = 80 + 12 = 92
- 12 * 6 = (10 + 2) * 6 = 10 * 6 + 2 * 6 = 60 + 12 = 72
- 22 * 4 = (20 + 2) * 4 = 20 * 4 + 2 * 4 = 80 + 8 = 88
Ответ: Выше приведены решения примеров.