21 加法 50 等于多少？
21 + 50 = 71
21加法50 等于 71
竖式演算
验算
- 用减法验算：71 − 50 = 21
- 用减法验算：71 − 21 = 50
相关题目
21 + 49 = 70
21 + 51 = 72
21 + 48 = 69
21 + 52 = 73
21 + 47 = 68
21 + 53 = 74
21 + 46 = 67
21 + 54 = 75
20 + 50 = 70
22 + 50 = 72
19 + 50 = 69
23 + 50 = 73
24 + 50 = 74
18 + 50 = 68
25 + 50 = 75
17 + 50 = 67
1 + 70 = 71
2 + 69 = 71
3 + 68 = 71
4 + 67 = 71
5 + 66 = 71
6 + 65 = 71
12 + 42 = 54
37 + 32 = 69
3 + 55 = 58
84 + 10 = 94
17 + 62 = 79
26 + 32 = 58
71 × 1 = 71
94 - 23 = 71