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9.9×1.02怎么简便计算?

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9.99×0.02简便计算

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9.8×10.2的简便计算

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9.5×10.1怎样简便计算

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9.9×1.02的简便方法

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9.99×1.01用简便方法计算

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9.8÷0.5÷0.2简便计算

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9.9ⅹ1.02简便计算

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9.6×1.25怎样简便计算

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9.9×1.01用简便方法怎么算

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