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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| 84 × 90 = | 89 × 20 = | 67 × 60 = | 29 × 10 = |
| 65 × 60 = | 37 × 90 = | 80 × 70 = | 46 × 80 = |
| 53 × 70 = | 27 × 70 = | 10 × 10 = | 33 × 70 = |
| 16 × 90 = | 64 × 20 = | 52 × 60 = | 32 × 90 = |
| 51 × 50 = | 52 × 50 = | 64 × 90 = | 70 × 90 = |