19 加法 31 等于多少？
19 + 31 = 50
19加法31 等于 50
竖式演算
验算
- 用减法验算：50 − 31 = 19
- 用减法验算：50 − 19 = 31
相关题目
19 + 30 = 49
19 + 32 = 51
19 + 29 = 48
19 + 33 = 52
19 + 28 = 47
19 + 34 = 53
19 + 35 = 54
19 + 27 = 46
20 + 31 = 51
18 + 31 = 49
21 + 31 = 52
17 + 31 = 48
22 + 31 = 53
16 + 31 = 47
23 + 31 = 54
15 + 31 = 46
1 + 49 = 50
2 + 48 = 50
3 + 47 = 50
4 + 46 = 50
5 + 45 = 50
6 + 44 = 50
54 + 95 = 149
57 + 91 = 148
33 + 76 = 109
32 + 90 = 122
80 + 93 = 173
9 + 52 = 61
10 × 5 = 50
87 - 37 = 50