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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| 8 × ( ) = 16 | ( ) × 8 = 56 | ( ) × 9 = 18 | 4 × ( ) = 16 |
| 5 × ( ) = 5 | ( ) × 2 = 6 | ( ) × 4 = 16 | 1 × ( ) = 4 |
| ( ) × 6 = 42 | ( ) × 4 = 12 | 4 × ( ) = 28 | 9 × ( ) = 72 |
| 2 × ( ) = 14 | 8 × ( ) = 64 | 2 × ( ) = 18 | ( ) × 8 = 56 |
| ( ) × 5 = 30 | ( ) × 8 = 72 | 8 × ( ) = 72 | ( ) × 1 = 1 |
| 1 × ( ) = 1 | ( ) × 3 = 9 | 6 × ( ) = 30 | 3 × ( ) = 9 |
| 3 × ( ) = 6 | ( ) × 9 = 36 | ( ) × 3 = 3 | 1 × ( ) = 7 |
| ( ) × 8 = 8 | ( ) × 9 = 72 | ( ) × 6 = 42 | ( ) × 9 = 9 |
| ( ) × 5 = 40 | ( ) × 3 = 6 | 6 × ( ) = 24 | 3 × ( ) = 15 |
| ( ) × 9 = 72 | 9 × ( ) = 72 | 4 × ( ) = 32 | ( ) × 2 = 8 |
| 4 × ( ) = 24 | ( ) × 7 = 35 | 7 × ( ) = 35 | ( ) × 6 = 18 |
| 4 × ( ) = 36 | ( ) × 4 = 16 | 1 × ( ) = 5 | 9 × ( ) = 18 |
| 8 × ( ) = 48 | ( ) × 7 = 7 |
消防员爸爸