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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| 4.9 - 3.9 = | 4.2 - 3.4 = | 4.3 - 2.9 = | 9.6 + 5.0 = |
| 0.6 + 4.7 = | 7.0 - 7.0 = | 9.6 - 5.0 = | 5.9 - 5.5 = |
| 7.0 - 4.8 = | 9.8 - 9.0 = | 5.6 - 4.3 = | 6.1 - 1.4 = |
| 4.3 + 2.9 = | 7.5 + 9.1 = | 5.1 + 8.0 = | 7.5 - 6.4 = |
| 8.6 + 0.8 = | 9.7 - 7.3 = | 9.5 - 7.8 = | 1.6 + 5.8 = |
| 1.6 - 0.2 = | 8.4 - 1.8 = | 5.6 + 4.3 = | 8.2 - 6.3 = |
| 6.3 + 7.9 = | 4.8 + 8.9 = | 0.1 + 2.4 = | 2.9 + 0.8 = |
| 3.6 - 0.9 = | 1.4 + 8.5 = | 6.1 + 1.4 = | 3.1 + 9.2 = |
| 5.9 - 5.1 = | 7.5 + 6.4 = | 3.6 - 1.9 = | 9.2 - 1.6 = |
| 9.5 - 6.3 = | 9.5 - 6.9 = | 2.3 + 7.2 = | 9.5 + 7.8 = |
| 5.1 + 8.1 = | 1.6 + 8.1 = | 7.8 - 7.0 = | 9.2 + 1.6 = |
| 3.9 + 6.9 = | 2.9 - 0.8 = | 3.6 + 0.9 = | 8.6 - 0.8 = |
| 7.8 + 7.0 = | 3.6 + 1.9 = |
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