11 加法 69 等于多少？
11 + 69 = 80
11加法69 等于 80
竖式演算
验算
- 用减法验算：80 − 69 = 11
- 用减法验算：80 − 11 = 69
相关题目
11 + 68 = 79
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10 + 69 = 79
12 + 69 = 81
13 + 69 = 82
9 + 69 = 78
14 + 69 = 83
8 + 69 = 77
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2 + 78 = 80
3 + 77 = 80
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47 + 47 = 94
33 + 8 = 41
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86 - 6 = 80