乘 6：5 倍再加一倍
乘 6 时，先算乘 5，再加上一个这个数。
先试三张
点一下卡片翻过来，看看为什么。
2 × 7
2 × 7 = 142行，每行7个，一共14个。
4 × 8
4 × 8 = 324行，每行8个，一共32个。
6 × 9
6 × 9 = 546行，每行9个，一共54个。
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开始练习本卡组全部 48 道题
- 2 × 6 = 12
- 3 × 6 = 18
- 4 × 6 = 24
- 5 × 6 = 30
- 6 × 6 = 36
- 7 × 6 = 42
- 8 × 6 = 48
- 9 × 6 = 54
- 10 × 6 = 60
- 11 × 6 = 66
- 12 × 6 = 72
- 1 × 6 = 6
- 2 × 7 = 14
- 3 × 7 = 21
- 4 × 7 = 28
- 5 × 7 = 35
- 6 × 7 = 42
- 7 × 7 = 49
- 8 × 7 = 56
- 9 × 7 = 63
- 10 × 7 = 70
- 11 × 7 = 77
- 12 × 7 = 84
- 1 × 7 = 7
- 2 × 8 = 16
- 3 × 8 = 24
- 4 × 8 = 32
- 5 × 8 = 40
- 6 × 8 = 48
- 7 × 8 = 56
- 8 × 8 = 64
- 9 × 8 = 72
- 10 × 8 = 80
- 11 × 8 = 88
- 12 × 8 = 96
- 1 × 8 = 8
- 2 × 9 = 18
- 3 × 9 = 27
- 4 × 9 = 36
- 5 × 9 = 45
- 6 × 9 = 54
- 7 × 9 = 63
- 8 × 9 = 72
- 9 × 9 = 81
- 10 × 9 = 90
- 11 × 9 = 99
- 12 × 9 = 108
- 1 × 9 = 9
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