20 加法 77 等于多少？
20 + 77 = 97
20加法77 等于 97
竖式演算
验算
- 用减法验算：97 − 77 = 20
- 用减法验算：97 − 20 = 77
相关题目
20 + 76 = 96
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21 + 77 = 98
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2 + 95 = 97
3 + 94 = 97
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52 + 3 = 55
5 + 62 = 67
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97 × 1 = 97
99 - 2 = 97