51 加法 21 等于多少？
51 + 21 = 72
51加法21 等于 72
竖式演算
验算
- 用减法验算：72 − 21 = 51
- 用减法验算：72 − 51 = 21
相关题目
51 + 20 = 71
51 + 22 = 73
51 + 19 = 70
51 + 23 = 74
51 + 24 = 75
51 + 18 = 69
51 + 25 = 76
51 + 17 = 68
50 + 21 = 71
52 + 21 = 73
49 + 21 = 70
53 + 21 = 74
48 + 21 = 69
54 + 21 = 75
47 + 21 = 68
55 + 21 = 76
1 + 71 = 72
2 + 70 = 72
3 + 69 = 72
4 + 68 = 72
5 + 67 = 72
6 + 66 = 72
2 + 50 = 52
6 + 80 = 86
45 + 1 = 46
14 + 52 = 66
10 + 65 = 75
20 + 43 = 63
74 - 2 = 72
76 - 4 = 72