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六年级数学：不规则图形的面积怎样计算？用割补法轻松解决
六年级数学：不规则图形的面积怎样计算？会方法的同学5秒钟可算出答案！割补法是计算不规则图形面积的好办法，同学们一定要学会哦。
六年级数学几何与图形专项10/15
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