17 加法 31 等于多少？
17 + 31 = 48
17加法31 等于 48
竖式演算
验算
- 用减法验算：48 − 31 = 17
- 用减法验算：48 − 17 = 31
相关题目
17 + 30 = 47
17 + 32 = 49
17 + 29 = 46
17 + 33 = 50
17 + 28 = 45
17 + 34 = 51
17 + 35 = 52
17 + 27 = 44
16 + 31 = 47
18 + 31 = 49
15 + 31 = 46
19 + 31 = 50
20 + 31 = 51
14 + 31 = 45
21 + 31 = 52
13 + 31 = 44
1 + 47 = 48
2 + 46 = 48
3 + 45 = 48
4 + 44 = 48
5 + 43 = 48
6 + 42 = 48
81 + 18 = 99
21 + 43 = 64
1 + 24 = 25
16 + 22 = 38
100 + 46 = 146
43 + 15 = 58
88 - 40 = 48
51 - 3 = 48