21 加法 60 等于多少？
21 + 60 = 81
21加法60 等于 81
竖式演算
验算
- 用减法验算：81 − 60 = 21
- 用减法验算：81 − 21 = 60
相关题目
21 + 59 = 80
21 + 61 = 82
21 + 58 = 79
21 + 62 = 83
21 + 57 = 78
21 + 63 = 84
21 + 56 = 77
21 + 64 = 85
20 + 60 = 80
22 + 60 = 82
19 + 60 = 79
23 + 60 = 83
24 + 60 = 84
18 + 60 = 78
25 + 60 = 85
17 + 60 = 77
1 + 80 = 81
2 + 79 = 81
3 + 78 = 81
4 + 77 = 81
5 + 76 = 81
6 + 75 = 81
25 + 42 = 67
16 + 23 = 39
21 + 26 = 47
25 + 71 = 96
33 + 23 = 56
46 + 10 = 56
100 - 19 = 81
1 × 81 = 81