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 × ( ) = 40 | ( ) × 7 = 63 | 3 × ( ) = 15 | 1 × ( ) = 7 |
| ( ) × 5 = 20 | 4 × ( ) = 16 | ( ) × 4 = 4 | 2 × ( ) = 18 |
| ( ) × 8 = 48 | 9 × ( ) = 72 | ( ) × 8 = 32 | ( ) × 4 = 28 |
| ( ) × 7 = 28 | 2 × ( ) = 6 | 9 × ( ) = 81 | ( ) × 1 = 1 |
| ( ) × 1 = 7 | 8 × ( ) = 32 | ( ) × 3 = 12 | ( ) × 2 = 14 |
| ( ) × 7 = 7 | ( ) × 8 = 40 | ( ) × 7 = 21 | ( ) × 9 = 27 |
| ( ) × 7 = 35 | 1 × ( ) = 8 | ( ) × 2 = 12 | 9 × ( ) = 27 |
| 5 × ( ) = 45 | 6 × ( ) = 36 | 6 × ( ) = 6 | 9 × ( ) = 45 |
| ( ) × 7 = 28 | 7 × ( ) = 42 | 6 × ( ) = 30 | ( ) × 5 = 45 |
| 8 × ( ) = 56 | 4 × ( ) = 24 | 4 × ( ) = 8 | 3 × ( ) = 24 |
| ( ) × 3 = 3 | 1 × ( ) = 2 | ( ) × 9 = 27 | 7 × ( ) = 56 |
| ( ) × 4 = 12 | ( ) × 1 = 1 | ( ) × 6 = 54 | ( ) × 2 = 14 |
| ( ) × 3 = 27 | 6 × ( ) = 54 |
消防员爸爸