52 减法 30 等于多少?
52 - 30 = 22
52减法30 等于 22
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验算
- 用加法验算:22 + 30 = 52
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52 - 29 = 23
52 - 31 = 21
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52 - 32 = 20
52 - 33 = 19
52 - 27 = 25
52 - 34 = 18
52 - 26 = 26
51 - 30 = 21
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50 - 30 = 20
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