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1.3 + 0.5 - 0.7 =
答案：
1.3 + 0.5 = 1.8，1.8 - 0.7 = 1.1
8.7 - 0.1 - 5.6 =
答案：
8.7 - 0.1 = 8.6，8.6 - 5.6 = 3.0 = 3
7.8 + 0.9 + 2.1 =
答案：
7.8 + 0.9 = 8.7，8.7 + 2.1 = 10.8
0.2 + 0.2 + 0.9 =
答案：
0.2 + 0.2 = 0.4，0.4 + 0.9 = 1.3
4.3 - 1.3 + 4.42 =
答案：
4.3 - 1.3 = 3.0，3.0 + 4.42 = 7.42
7.1 + 0.6 - 0.7 =
答案：
7.1 + 0.6 = 7.7，7.7 - 0.7 = 7.0 = 7
7.61 - 5.61 + 2.46 =
答案：
7.61 - 5.61 = 2.00，2.00 + 2.46 = 4.46
0.6 + 8.1 - 8.6 =
答案：
0.6 + 8.1 = 8.7，8.7 - 8.6 = 0.1
5.1 + 0.3 - 0.5 =
答案：
5.1 + 0.3 = 5.4，5.4 - 0.5 = 4.9
3.25 - 0.05 - 0.9 =
答案：
3.25 - 0.05 = 3.20，3.20 - 0.9 = 2.3
5.4 - 1.1 - 0.9 =
答案：
5.4 - 1.1 = 4.3，4.3 - 0.9 = 3.4
4.3 - 2.3 + 8.23 =
答案：
4.3 - 2.3 = 2.0，2.0 + 8.23 = 10.23
5.3 + 0.4 - 0.8 =
答案：
5.3 + 0.4 = 5.7，5.7 - 0.8 = 4.9
5.2 - 1.2 + 4.84 =
答案：
5.2 - 1.2 = 4.0，4.0 + 4.84 = 8.84
8.8 - 1.7 - 5.3 =
答案：
8.8 - 1.7 = 7.1，7.1 - 5.3 = 1.8
1.2 - 0.7 - 0.3 =
答案：
1.2 - 0.7 = 0.5，0.5 - 0.3 = 0.2
7.2 + 0.4 - 0.6 =
答案：
7.2 + 0.4 = 7.6，7.6 - 0.6 = 7.0 = 7
3.3 + 0.5 - 0.6 =
答案：
3.3 + 0.5 = 3.8，3.8 - 0.6 = 3.2
0.3 + 7.3 - 2.6 =
答案：
0.3 + 7.3 = 7.6，7.6 - 2.6 = 5.0 = 5
4.6 - 2.1 - 0.9 =
答案：
4.6 - 2.1 = 2.5，2.5 - 0.9 = 1.6
7.1 - 3.1 + 4.66 =
答案：
7.1 - 3.1 = 4.0，4.0 + 4.66 = 8.66
6.6 - 1.7 - 3.3 =
答案：
6.6 - 1.7 = 4.9，4.9 - 3.3 = 1.6
0.5 + 8.5 - 2.6 =
答案：
0.5 + 8.5 = 9.0，9.0 - 2.6 = 6.4
8.4 - 3.4 + 4.7 =
答案：
8.4 - 3.4 = 5.0，5.0 + 4.7 = 9.7
8.4 - 3.4 + 72.7 =
答案：
8.4 - 3.4 = 5.0，5.0 + 72.7 = 77.7
0.3 + 6.2 - 6.3 =
答案：
0.3 + 6.2 = 6.5，6.5 - 6.3 = 0.2
5.32 - 1.32 + 3.3 =
答案：
5.32 - 1.32 = 4.00，4.00 + 3.3 = 7.3
7.4 + 0.5 - 0.6 =
答案：
7.4 + 0.5 = 7.9，7.9 - 0.6 = 7.3
0.3 + 5.1 - 4.3 =
答案：
0.3 + 5.1 = 5.4，5.4 - 4.3 = 1.1
0.6 + 8.5 + 5.4 =
答案：
0.6 + 8.5 = 9.1，9.1 + 5.4 = 14.5
4.4 + 3.4 + 3.6 =
答案：
4.4 + 3.4 = 7.8，7.8 + 3.6 = 11.4
8.54 - 1.54 + 72.4 =
答案：
8.54 - 1.54 = 7.00，7.00 + 72.4 = 79.4
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