21 加法 29 等于多少？
21 + 29 = 50
21加法29 等于 50
竖式演算
验算
- 用减法验算：50 − 29 = 21
- 用减法验算：50 − 21 = 29
相关题目
21 + 28 = 49
21 + 30 = 51
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21 + 27 = 48
21 + 32 = 53
21 + 26 = 47
21 + 33 = 54
21 + 25 = 46
20 + 29 = 49
22 + 29 = 51
19 + 29 = 48
23 + 29 = 52
24 + 29 = 53
18 + 29 = 47
25 + 29 = 54
17 + 29 = 46
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2 + 48 = 50
3 + 47 = 50
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5 + 45 = 50
6 + 44 = 50
91 + 62 = 153
50 + 51 = 101
61 + 80 = 141
81 + 46 = 127
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75 - 25 = 50