82 减法 80 等于多少？
82 - 80 = 2
82减法80 等于 2
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验算
- 用加法验算：2 + 80 = 82
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82 - 79 = 3
82 - 81 = 1
82 - 78 = 4
82 - 82 = 0
82 - 77 = 5
82 - 76 = 6
82 - 75 = 7
82 - 74 = 8
81 - 80 = 1
83 - 80 = 3
80 - 80 = 0
84 - 80 = 4
85 - 80 = 5
86 - 80 = 6
87 - 80 = 7
88 - 80 = 8
3 - 1 = 2
4 - 2 = 2
5 - 3 = 2
6 - 4 = 2
7 - 5 = 2
8 - 6 = 2
36 - 10 = 26
22 - 21 = 1
16 - 5 = 11
74 - 74 = 0
28 - 13 = 15
8 - 8 = 0
2 × 1 = 2
1 + 1 = 2