8 加法 23 等于多少？
8 + 23 = 31
8加法23 等于 31
竖式演算
验算
- 用减法验算：31 − 23 = 8
- 用减法验算：31 − 8 = 23
相关题目
8 + 22 = 30
8 + 24 = 32
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8 + 25 = 33
8 + 20 = 28
8 + 26 = 34
8 + 19 = 27
8 + 27 = 35
7 + 23 = 30
9 + 23 = 32
6 + 23 = 29
10 + 23 = 33
11 + 23 = 34
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2 + 29 = 31
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