23 加法 8 等于多少？
23 + 8 = 31
23加法8 等于 31
竖式演算
验算
- 用减法验算：31 − 8 = 23
- 用减法验算：31 − 23 = 8
相关题目
23 + 7 = 30
23 + 9 = 32
23 + 6 = 29
23 + 10 = 33
23 + 11 = 34
23 + 5 = 28
23 + 12 = 35
23 + 4 = 27
22 + 8 = 30
24 + 8 = 32
21 + 8 = 29
25 + 8 = 33
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2 + 29 = 31
3 + 28 = 31
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91 + 48 = 139
93 + 24 = 117
96 + 32 = 128
71 + 90 = 161
27 + 39 = 66
71 + 53 = 124
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97 - 66 = 31