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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| 57 × 60 = | 46 × 50 = | 63 × 80 = | 60 × 90 = |
| 21 × 70 = | 10 × 70 = | 27 × 90 = | 44 × 90 = |
| 83 × 50 = | 62 × 80 = | 84 × 10 = | 86 × 30 = |
| 34 × 10 = | 81 × 50 = | 42 × 80 = | 64 × 90 = |
| 43 × 90 = | 33 × 20 = | 80 × 20 = | 24 × 50 = |