71 加法 20 等于多少？
71 + 20 = 91
71加法20 等于 91
竖式演算
验算
- 用减法验算：91 − 20 = 71
- 用减法验算：91 − 71 = 20
相关题目
71 + 19 = 90
71 + 21 = 92
71 + 22 = 93
71 + 18 = 89
71 + 23 = 94
71 + 17 = 88
71 + 24 = 95
71 + 16 = 87
70 + 20 = 90
72 + 20 = 92
69 + 20 = 89
73 + 20 = 93
74 + 20 = 94
68 + 20 = 88
75 + 20 = 95
67 + 20 = 87
1 + 90 = 91
2 + 89 = 91
3 + 88 = 91
4 + 87 = 91
5 + 86 = 91
6 + 85 = 91
11 + 7 = 18
90 + 6 = 96
1 + 45 = 46
37 + 42 = 79
68 + 10 = 78
4 + 65 = 69
98 - 7 = 91
93 - 2 = 91