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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| 3.8 + 8.1 = | 7.4 - 4.0 = | 7.7 + 7.9 = | 9.8 - 5.8 = |
| 8.4 - 0.5 = | 6.1 - 2.6 = | 4.8 + 0.5 = | 2.0 + 6.3 = |
| 1.1 + 5.5 = | 9.6 - 7.6 = | 4.9 + 5.2 = | 8.9 - 1.1 = |
| 4.7 - 4.2 = | 3.1 + 9.0 = | 3.7 + 3.9 = | 3.2 - 1.5 = |
| 7.1 + 2.1 = | 8.2 - 5.5 = | 1.8 - 0.6 = | 8.0 - 6.0 = |
| 9.9 - 6.7 = | 0.4 + 7.7 = | 6.3 - 5.4 = | 5.6 - 1.3 = |
| 8.7 + 1.6 = | 7.6 - 1.6 = | 6.0 - 1.6 = | 9.4 - 1.0 = |
| 1.4 - 0.7 = | 8.6 - 4.2 = | 3.4 + 2.7 = | 9.5 + 0.5 = |
| 3.3 + 2.9 = | 3.2 + 1.4 = | 4.0 + 6.6 = | 2.9 + 8.8 = |
| 7.0 + 9.8 = | 6.3 - 0.2 = | 6.4 - 1.0 = | 8.2 - 3.5 = |
| 1.5 + 5.1 = | 9.1 + 7.1 = | 1.3 + 5.8 = | 9.9 + 5.7 = |
| 1.0 + 3.3 = | 7.2 - 1.8 = | 5.8 - 2.5 = | 9.0 + 2.1 = |
| 4.0 + 7.8 = | 8.0 - 6.5 = |
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