42 加法 21 等于多少？
42 + 21 = 63
42加法21 等于 63
竖式演算
验算
- 用减法验算：63 − 21 = 42
- 用减法验算：63 − 42 = 21
相关题目
42 + 20 = 62
42 + 22 = 64
42 + 19 = 61
42 + 23 = 65
42 + 24 = 66
42 + 18 = 60
42 + 25 = 67
42 + 17 = 59
41 + 21 = 62
43 + 21 = 64
40 + 21 = 61
44 + 21 = 65
39 + 21 = 60
45 + 21 = 66
38 + 21 = 59
46 + 21 = 67
1 + 62 = 63
2 + 61 = 63
3 + 60 = 63
4 + 59 = 63
5 + 58 = 63
6 + 57 = 63
64 + 21 = 85
10 + 32 = 42
18 + 21 = 39
51 + 15 = 66
21 + 16 = 37
11 + 40 = 51
96 - 33 = 63
83 - 20 = 63