55 加法 20 等于多少？
55 + 20 = 75
55加法20 等于 75
竖式演算
验算
- 用减法验算：75 − 20 = 55
- 用减法验算：75 − 55 = 20
相关题目
55 + 19 = 74
55 + 21 = 76
55 + 22 = 77
55 + 18 = 73
55 + 23 = 78
55 + 17 = 72
55 + 24 = 79
55 + 16 = 71
56 + 20 = 76
54 + 20 = 74
57 + 20 = 77
53 + 20 = 73
58 + 20 = 78
52 + 20 = 72
59 + 20 = 79
51 + 20 = 71
1 + 74 = 75
2 + 73 = 75
3 + 72 = 75
4 + 71 = 75
5 + 70 = 75
6 + 69 = 75
5 + 92 = 97
17 + 21 = 38
22 + 51 = 73
65 + 13 = 78
20 + 39 = 59
33 + 36 = 69
76 - 1 = 75
97 - 22 = 75