15 加法 16 等于多少？
15 + 16 = 31
15加法16 等于 31
竖式演算
验算
- 用减法验算：31 − 16 = 15
- 用减法验算：31 − 15 = 16
相关题目
15 + 15 = 30
15 + 17 = 32
15 + 14 = 29
15 + 18 = 33
15 + 13 = 28
15 + 19 = 34
15 + 20 = 35
15 + 12 = 27
14 + 16 = 30
16 + 16 = 32
13 + 16 = 29
17 + 16 = 33
12 + 16 = 28
18 + 16 = 34
11 + 16 = 27
19 + 16 = 35
1 + 30 = 31
2 + 29 = 31
3 + 28 = 31
4 + 27 = 31
5 + 26 = 31
6 + 25 = 31
69 + 60 = 129
95 + 63 = 158
75 + 71 = 146
23 + 94 = 117
26 + 9 = 35
58 + 23 = 81
39 - 8 = 31
73 - 42 = 31