31 加法 30 等于多少？
31 + 30 = 61
31加法30 等于 61
竖式演算
验算
- 用减法验算：61 − 30 = 31
- 用减法验算：61 − 31 = 30
相关题目
31 + 29 = 60
31 + 31 = 62
31 + 28 = 59
31 + 32 = 63
31 + 33 = 64
31 + 27 = 58
31 + 34 = 65
31 + 26 = 57
30 + 30 = 60
32 + 30 = 62
29 + 30 = 59
33 + 30 = 63
28 + 30 = 58
34 + 30 = 64
35 + 30 = 65
27 + 30 = 57
1 + 60 = 61
2 + 59 = 61
3 + 58 = 61
4 + 57 = 61
5 + 56 = 61
6 + 55 = 61
51 + 28 = 79
2 + 21 = 23
72 + 3 = 75
40 + 26 = 66
11 + 28 = 39
13 + 3 = 16
63 - 2 = 61
93 - 32 = 61