30 加法 1 等于多少？
30 + 1 = 31
30加法1 等于 31
竖式演算
验算
- 用减法验算：31 − 1 = 30
- 用减法验算：31 − 30 = 1
相关题目
30 + 2 = 32
30 + 3 = 33
30 + 4 = 34
30 + 5 = 35
30 + 6 = 36
30 + 7 = 37
30 + 8 = 38
30 + 9 = 39
29 + 1 = 30
31 + 1 = 32
28 + 1 = 29
32 + 1 = 33
33 + 1 = 34
27 + 1 = 28
34 + 1 = 35
26 + 1 = 27
1 + 30 = 31
2 + 29 = 31
3 + 28 = 31
4 + 27 = 31
5 + 26 = 31
6 + 25 = 31
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30 + 21 = 51
64 + 100 = 164
31 + 52 = 83
15 + 64 = 79
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93 - 62 = 31