12 加法 31 等于多少？
12 + 31 = 43
12加法31 等于 43
竖式演算
验算
- 用减法验算：43 − 31 = 12
- 用减法验算：43 − 12 = 31
相关题目
12 + 30 = 42
12 + 32 = 44
12 + 29 = 41
12 + 33 = 45
12 + 28 = 40
12 + 34 = 46
12 + 35 = 47
12 + 27 = 39
11 + 31 = 42
13 + 31 = 44
10 + 31 = 41
14 + 31 = 45
15 + 31 = 46
9 + 31 = 40
16 + 31 = 47
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1 + 42 = 43
2 + 41 = 43
3 + 40 = 43
4 + 39 = 43
5 + 38 = 43
6 + 37 = 43
4 + 14 = 18
69 + 100 = 169
3 + 56 = 59
15 + 73 = 88
40 + 32 = 72
35 + 33 = 68
46 - 3 = 43
100 - 57 = 43