61 加法 20 等于多少？
61 + 20 = 81
61加法20 等于 81
竖式演算
验算
- 用减法验算：81 − 20 = 61
- 用减法验算：81 − 61 = 20
相关题目
61 + 19 = 80
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61 + 22 = 83
61 + 18 = 79
61 + 23 = 84
61 + 17 = 78
61 + 24 = 85
61 + 16 = 77
60 + 20 = 80
62 + 20 = 82
59 + 20 = 79
63 + 20 = 83
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2 + 79 = 81
3 + 78 = 81
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6 + 75 = 81
70 + 10 = 80
31 + 8 = 39
41 + 51 = 92
85 + 3 = 88
82 + 6 = 88
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94 - 13 = 81