51 加法 20 等于多少？
51 + 20 = 71
51加法20 等于 71
竖式演算
验算
- 用减法验算：71 − 20 = 51
- 用减法验算：71 − 51 = 20
相关题目
51 + 19 = 70
51 + 21 = 72
51 + 22 = 73
51 + 18 = 69
51 + 23 = 74
51 + 17 = 68
51 + 24 = 75
51 + 16 = 67
50 + 20 = 70
52 + 20 = 72
49 + 20 = 69
53 + 20 = 73
48 + 20 = 68
54 + 20 = 74
47 + 20 = 67
55 + 20 = 75
1 + 70 = 71
2 + 69 = 71
3 + 68 = 71
4 + 67 = 71
5 + 66 = 71
6 + 65 = 71
10 + 43 = 53
36 + 11 = 47
21 + 7 = 28
71 + 100 = 171
64 + 33 = 97
31 + 100 = 131
97 - 26 = 71
79 - 8 = 71