31 加法 2 等于多少？
31 + 2 = 33
31加法2 等于 33
竖式演算
验算
- 用减法验算：33 − 2 = 31
- 用减法验算：33 − 31 = 2
相关题目
31 + 1 = 32
31 + 3 = 34
31 + 4 = 35
31 + 5 = 36
31 + 6 = 37
31 + 7 = 38
31 + 8 = 39
31 + 9 = 40
30 + 2 = 32
32 + 2 = 34
29 + 2 = 31
33 + 2 = 35
28 + 2 = 30
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