3 加法 28 等于多少？
3 + 28 = 31
3加法28 等于 31
竖式演算
验算
- 用减法验算：31 − 28 = 3
- 用减法验算：31 − 3 = 28
相关题目
3 + 29 = 32
3 + 27 = 30
3 + 30 = 33
3 + 26 = 29
3 + 31 = 34
3 + 25 = 28
3 + 32 = 35
3 + 24 = 27
2 + 28 = 30
4 + 28 = 32
1 + 28 = 29
5 + 28 = 33
6 + 28 = 34
7 + 28 = 35
8 + 28 = 36
9 + 28 = 37
1 + 30 = 31
2 + 29 = 31
4 + 27 = 31
5 + 26 = 31
6 + 25 = 31
7 + 24 = 31
18 + 42 = 60
44 + 72 = 116
93 + 44 = 137
14 + 68 = 82
9 + 4 = 13
81 + 42 = 123
100 - 69 = 31
57 - 26 = 31