20 加法 50 等于多少？
20 + 50 = 70
20加法50 等于 70
竖式演算
验算
- 用减法验算：70 − 50 = 20
- 用减法验算：70 − 20 = 50
相关题目
20 + 49 = 69
20 + 51 = 71
20 + 48 = 68
20 + 52 = 72
20 + 47 = 67
20 + 53 = 73
20 + 46 = 66
20 + 54 = 74
19 + 50 = 69
21 + 50 = 71
22 + 50 = 72
18 + 50 = 68
23 + 50 = 73
17 + 50 = 67
24 + 50 = 74
16 + 50 = 66
1 + 69 = 70
2 + 68 = 70
3 + 67 = 70
4 + 66 = 70
5 + 65 = 70
6 + 64 = 70
4 + 23 = 27
15 + 4 = 19
32 + 41 = 73
52 + 3 = 55
75 + 21 = 96
13 + 73 = 86
90 - 20 = 70
86 - 16 = 70