42 加法 49 等于多少？
42 + 49 = 91
42加法49 等于 91
竖式演算
验算
- 用减法验算：91 − 49 = 42
- 用减法验算：91 − 42 = 49
相关题目
42 + 48 = 90
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42 + 52 = 94
42 + 53 = 95
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41 + 49 = 90
43 + 49 = 92
40 + 49 = 89
44 + 49 = 93
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2 + 89 = 91
3 + 88 = 91
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98 + 31 = 129
80 + 30 = 110
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