42 加法 15 等于多少？
42 + 15 = 57
42加法15 等于 57
竖式演算
验算
- 用减法验算：57 − 15 = 42
- 用减法验算：57 − 42 = 15
相关题目
42 + 14 = 56
42 + 16 = 58
42 + 13 = 55
42 + 17 = 59
42 + 12 = 54
42 + 18 = 60
42 + 11 = 53
42 + 19 = 61
41 + 15 = 56
43 + 15 = 58
40 + 15 = 55
44 + 15 = 59
39 + 15 = 54
45 + 15 = 60
38 + 15 = 53
46 + 15 = 61
1 + 56 = 57
2 + 55 = 57
3 + 54 = 57
4 + 53 = 57
5 + 52 = 57
6 + 51 = 57
30 + 58 = 88
20 + 22 = 42
5 + 91 = 96
43 + 46 = 89
21 + 72 = 93
53 + 20 = 73
81 - 24 = 57
99 - 42 = 57