20 加法 13 等于多少？
20 + 13 = 33
20加法13 等于 33
竖式演算
验算
- 用减法验算：33 − 13 = 20
- 用减法验算：33 − 20 = 13
相关题目
20 + 12 = 32
20 + 14 = 34
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20 + 15 = 35
20 + 10 = 30
20 + 16 = 36
20 + 17 = 37
20 + 9 = 29
19 + 13 = 32
21 + 13 = 34
22 + 13 = 35
18 + 13 = 31
23 + 13 = 36
17 + 13 = 30
24 + 13 = 37
16 + 13 = 29
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2 + 31 = 33
3 + 30 = 33
4 + 29 = 33
5 + 28 = 33
6 + 27 = 33
21 + 36 = 57
22 + 56 = 78
60 + 1 = 61
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24 + 51 = 75
41 + 3 = 44
43 - 10 = 33
45 - 12 = 33