15 加法 13 等于多少？
15 + 13 = 28
15加法13 等于 28
竖式演算
验算
- 用减法验算：28 − 13 = 15
- 用减法验算：28 − 15 = 13
相关题目
15 + 12 = 27
15 + 14 = 29
15 + 11 = 26
15 + 15 = 30
15 + 10 = 25
15 + 16 = 31
15 + 17 = 32
15 + 9 = 24
14 + 13 = 27
16 + 13 = 29
13 + 13 = 26
17 + 13 = 30
12 + 13 = 25
18 + 13 = 31
11 + 13 = 24
19 + 13 = 32
1 + 27 = 28
2 + 26 = 28
3 + 25 = 28
4 + 24 = 28
5 + 23 = 28
6 + 22 = 28
44 + 31 = 75
83 + 3 = 86
51 + 48 = 99
6 + 72 = 78
43 + 42 = 85
12 + 74 = 86
69 - 41 = 28
93 - 65 = 28