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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| 7.4 - 2.6 = | 1.2 + 1.7 = | 3.1 + 7.8 = | 9.5 - 3.6 = |
| 5.0 - 4.6 = | 5.0 + 4.6 = | 9.7 + 3.2 = | 8.3 + 1.6 = |
| 6.7 - 3.3 = | 4.4 - 0.5 = | 4.0 - 0.2 = | 6.1 + 0.9 = |
| 2.9 + 8.8 = | 5.6 + 1.8 = | 5.6 - 1.8 = | 2.6 - 1.5 = |
| 7.2 + 9.6 = | 3.4 - 1.8 = | 2.9 - 0.8 = | 9.3 + 1.7 = |
| 9.3 - 1.7 = | 6.1 - 0.9 = | 2.4 + 5.8 = | 5.1 - 3.9 = |
| 7.1 - 4.0 = | 8.3 - 1.6 = | 7.4 - 6.0 = | 4.0 + 0.2 = |
| 9.2 - 3.3 = | 3.7 - 3.5 = | 0.4 + 2.6 = | 9.4 + 9.9 = |
| 7.2 - 5.3 = | 3.4 + 1.8 = | 8.9 - 0.4 = | 6.2 + 4.9 = |
| 2.6 + 1.5 = | 1.8 + 6.7 = | 6.5 - 0.2 = | 7.4 + 6.0 = |
| 6.2 - 4.9 = | 9.5 + 3.6 = | 9.7 - 3.2 = | 5.8 + 6.8 = |
| 7.4 + 2.6 = | 7.7 - 5.8 = | 1.1 + 7.3 = | 1.8 + 4.4 = |
| 6.4 - 6.4 = | 5.7 + 7.3 = |
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