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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| ( ) × 3 = 12 | 1 × ( ) = 6 | 2 × ( ) = 14 | ( ) × 5 = 40 |
| ( ) × 8 = 16 | 6 × ( ) = 42 | 6 × ( ) = 18 | ( ) × 9 = 72 |
| ( ) × 9 = 27 | ( ) × 5 = 20 | 7 × ( ) = 14 | ( ) × 7 = 63 |
| 4 × ( ) = 16 | ( ) × 2 = 10 | ( ) × 9 = 81 | 4 × ( ) = 16 |
| 2 × ( ) = 4 | 3 × ( ) = 27 | 1 × ( ) = 6 | ( ) × 7 = 28 |
| 5 × ( ) = 15 | 5 × ( ) = 25 | ( ) × 8 = 64 | ( ) × 5 = 20 |
| 9 × ( ) = 63 | 1 × ( ) = 1 | 5 × ( ) = 10 | 1 × ( ) = 5 |
| ( ) × 2 = 16 | ( ) × 5 = 5 | 6 × ( ) = 6 | ( ) × 3 = 6 |
| 6 × ( ) = 24 | ( ) × 4 = 20 | 2 × ( ) = 14 | 4 × ( ) = 20 |
| 4 × ( ) = 12 | 8 × ( ) = 56 | ( ) × 1 = 3 | ( ) × 3 = 27 |
| 2 × ( ) = 4 | 6 × ( ) = 54 | 1 × ( ) = 1 | ( ) × 4 = 12 |
| 9 × ( ) = 72 | 1 × ( ) = 3 | 7 × ( ) = 49 | ( ) × 4 = 28 |
| 5 × ( ) = 20 | ( ) × 9 = 81 |
消防员爸爸