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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| ( ) × 9 = 54 | 7 × ( ) = 35 | 9 × ( ) = 27 | 2 × ( ) = 10 |
| ( ) × 7 = 42 | 8 × ( ) = 40 | 2 × ( ) = 8 | 7 × ( ) = 7 |
| 4 × ( ) = 28 | ( ) × 9 = 45 | 8 × ( ) = 32 | 2 × ( ) = 2 |
| ( ) × 3 = 3 | ( ) × 2 = 18 | 8 × ( ) = 40 | ( ) × 4 = 24 |
| ( ) × 4 = 4 | 1 × ( ) = 3 | ( ) × 8 = 56 | 3 × ( ) = 6 |
| ( ) × 9 = 18 | 2 × ( ) = 16 | ( ) × 4 = 28 | ( ) × 6 = 18 |
| ( ) × 4 = 24 | ( ) × 5 = 35 | ( ) × 4 = 24 | 7 × ( ) = 7 |
| 6 × ( ) = 36 | 1 × ( ) = 7 | 1 × ( ) = 3 | ( ) × 4 = 28 |
| ( ) × 2 = 16 | ( ) × 9 = 45 | 9 × ( ) = 72 | 1 × ( ) = 1 |
| ( ) × 3 = 15 | 9 × ( ) = 9 | ( ) × 3 = 24 | 9 × ( ) = 36 |
| 5 × ( ) = 40 | 4 × ( ) = 32 | 8 × ( ) = 64 | ( ) × 7 = 21 |
| ( ) × 3 = 27 | ( ) × 1 = 7 | ( ) × 3 = 12 | ( ) × 8 = 16 |
| 1 × ( ) = 5 | 2 × ( ) = 14 |
消防员爸爸