2 加法 28 等于多少？
2 + 28 = 30
2加法28 等于 30
竖式演算
验算
- 用减法验算：30 − 28 = 2
- 用减法验算：30 − 2 = 28
相关题目
2 + 29 = 31
2 + 27 = 29
2 + 30 = 32
2 + 26 = 28
2 + 31 = 33
2 + 25 = 27
2 + 32 = 34
2 + 24 = 26
1 + 28 = 29
3 + 28 = 31
4 + 28 = 32
5 + 28 = 33
6 + 28 = 34
7 + 28 = 35
8 + 28 = 36
9 + 28 = 37
1 + 29 = 30
3 + 27 = 30
4 + 26 = 30
5 + 25 = 30
6 + 24 = 30
7 + 23 = 30
82 + 47 = 129
15 + 15 = 30
76 + 14 = 90
34 + 17 = 51
71 + 9 = 80
44 + 18 = 62
96 - 66 = 30
99 - 69 = 30