60 加法 21 等于多少？
60 + 21 = 81
60加法21 等于 81
竖式演算
验算
- 用减法验算：81 − 21 = 60
- 用减法验算：81 − 60 = 21
相关题目
60 + 20 = 80
60 + 22 = 82
60 + 19 = 79
60 + 23 = 83
60 + 24 = 84
60 + 18 = 78
60 + 25 = 85
60 + 17 = 77
59 + 21 = 80
61 + 21 = 82
58 + 21 = 79
62 + 21 = 83
57 + 21 = 78
63 + 21 = 84
56 + 21 = 77
64 + 21 = 85
1 + 80 = 81
2 + 79 = 81
3 + 78 = 81
4 + 77 = 81
5 + 76 = 81
6 + 75 = 81
32 + 12 = 44
12 + 33 = 45
57 + 22 = 79
52 + 11 = 63
74 + 20 = 94
34 + 10 = 44
93 - 12 = 81
94 - 13 = 81