20 加法 81 等于多少？
20 + 81 = 101
20加法81 等于 101
竖式演算
验算
- 用减法验算：101 − 81 = 20
- 用减法验算：101 − 20 = 81
相关题目
20 + 80 = 100
20 + 82 = 102
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20 + 84 = 104
20 + 78 = 98
20 + 85 = 105
20 + 77 = 97
19 + 81 = 100
21 + 81 = 102
22 + 81 = 103
18 + 81 = 99
23 + 81 = 104
17 + 81 = 98
24 + 81 = 105
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1 + 100 = 101
2 + 99 = 101
3 + 98 = 101
4 + 97 = 101
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6 + 95 = 101
43 + 83 = 126
36 + 47 = 83
46 + 18 = 64
92 + 44 = 136
75 + 33 = 108
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10 + 88 = 98
33 + 93 = 126