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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| 5.8 - 4.3 = | 5.2 - 2.7 = | 7.4 - 0.8 = | 1.2 - 1.0 = |
| 0.5 + 8.2 = | 3.9 - 0.3 = | 6.0 - 0.3 = | 7.9 + 5.5 = |
| 7.4 + 0.8 = | 1.2 + 5.6 = | 2.0 - 0.4 = | 8.2 + 1.8 = |
| 8.1 + 3.8 = | 6.1 - 3.4 = | 2.2 + 3.3 = | 2.5 + 1.8 = |
| 8.6 - 1.7 = | 3.3 + 4.6 = | 4.0 + 5.1 = | 3.9 + 0.3 = |
| 2.5 + 6.5 = | 8.5 + 9.2 = | 5.8 + 4.3 = | 7.2 - 5.6 = |
| 8.1 - 3.8 = | 8.8 + 9.8 = | 7.2 + 5.6 = | 0.1 + 4.6 = |
| 9.9 - 9.6 = | 7.0 + 7.7 = | 8.2 + 3.3 = | 4.1 + 7.9 = |
| 0.5 + 0.8 = | 8.2 - 1.8 = | 2.5 - 1.8 = | 7.9 - 5.5 = |
| 9.9 - 7.2 = | 8.8 - 1.2 = | 2.0 + 6.6 = | 5.7 - 2.1 = |
| 6.6 + 8.1 = | 9.8 - 2.0 = | 6.3 + 3.5 = | 7.7 - 2.4 = |
| 5.9 + 4.2 = | 8.2 - 3.3 = | 8.5 - 7.7 = | 6.3 - 3.5 = |
| 5.9 - 4.2 = | 5.8 - 0.4 = |
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