50 加法 21 等于多少？
50 + 21 = 71
50加法21 等于 71
竖式演算
验算
- 用减法验算：71 − 21 = 50
- 用减法验算：71 − 50 = 21
相关题目
50 + 20 = 70
50 + 22 = 72
50 + 19 = 69
50 + 23 = 73
50 + 24 = 74
50 + 18 = 68
50 + 25 = 75
50 + 17 = 67
49 + 21 = 70
51 + 21 = 72
48 + 21 = 69
52 + 21 = 73
47 + 21 = 68
53 + 21 = 74
46 + 21 = 67
54 + 21 = 75
1 + 70 = 71
2 + 69 = 71
3 + 68 = 71
4 + 67 = 71
5 + 66 = 71
6 + 65 = 71
2 + 42 = 44
10 + 71 = 81
45 + 20 = 65
3 + 71 = 74
50 + 34 = 84
100 + 63 = 163
75 - 4 = 71
73 - 2 = 71