跟着消防员爸爸学习C++编程与算法（请备注算法学习）
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| 2 × ( ) = 12 | ( ) × 2 = 12 | ( ) × 6 = 54 | 2 × ( ) = 2 |
| ( ) × 9 = 81 | 3 × ( ) = 27 | 2 × ( ) = 10 | 4 × ( ) = 32 |
| ( ) × 6 = 12 | 6 × ( ) = 6 | ( ) × 6 = 54 | 3 × ( ) = 9 |
| ( ) × 6 = 12 | 9 × ( ) = 81 | ( ) × 9 = 27 | ( ) × 8 = 24 |
| ( ) × 3 = 9 | ( ) × 9 = 72 | ( ) × 7 = 63 | 7 × ( ) = 63 |
| ( ) × 2 = 8 | ( ) × 2 = 12 | ( ) × 7 = 35 | 7 × ( ) = 42 |
| ( ) × 5 = 20 | 8 × ( ) = 16 | 6 × ( ) = 12 | ( ) × 7 = 42 |
| ( ) × 8 = 56 | ( ) × 3 = 18 | 1 × ( ) = 7 | ( ) × 6 = 12 |
| ( ) × 5 = 30 | 1 × ( ) = 7 | ( ) × 6 = 30 | ( ) × 9 = 27 |
| 5 × ( ) = 20 | ( ) × 8 = 56 | 8 × ( ) = 72 | 5 × ( ) = 10 |
| ( ) × 1 = 9 | 8 × ( ) = 56 | 7 × ( ) = 56 | ( ) × 2 = 6 |
| ( ) × 5 = 35 | 2 × ( ) = 8 | 1 × ( ) = 7 | 6 × ( ) = 12 |
| 6 × ( ) = 12 | 8 × ( ) = 32 |
消防员爸爸