20 加法 10 等于多少？
20 + 10 = 30
20加法10 等于 30
竖式演算
验算
- 用减法验算：30 − 10 = 20
- 用减法验算：30 − 20 = 10
相关题目
20 + 11 = 31
20 + 9 = 29
20 + 12 = 32
20 + 8 = 28
20 + 13 = 33
20 + 7 = 27
20 + 14 = 34
20 + 6 = 26
19 + 10 = 29
21 + 10 = 31
22 + 10 = 32
18 + 10 = 28
23 + 10 = 33
17 + 10 = 27
24 + 10 = 34
16 + 10 = 26
1 + 29 = 30
2 + 28 = 30
3 + 27 = 30
4 + 26 = 30
5 + 25 = 30
6 + 24 = 30
16 + 60 = 76
35 + 61 = 96
40 + 7 = 47
45 + 4 = 49
60 + 23 = 83
19 + 40 = 59
88 - 58 = 30
77 - 47 = 30