甲数5除以7的商是循环小数乙数，商是15，如果甲数5除以7的商是循环小数10，要使商不变，乙数应该（）。

来源：蜘蛛抓取(WebSpider) 时间：2017-11-16 04:04 标签： 65除以7的商是几位数
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甲数是乙数的3倍，甲数除以乙数的商是______；如果甲数缩小5倍，要使商不变，乙数应当______．
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（1）甲数是乙数的3倍，即：甲数÷乙数=3；（2）甲数缩小5倍，要使商不变，乙数应当缩小5倍．故答案为：3，缩小5倍．
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其他类似问题
（1）根据倍数关系即可求出甲数除以乙数的商；（2）根据商不变的规律，要使商不变，除数也应缩小相同的倍数．
本题考点：
商的变化规律；整数的除法及应用．
考点点评：
商不变规律：被除数和除数同时扩大或缩小相同的倍数（0除外），商不变．
甲数是乙数的3倍，甲数除以乙数的商是（3）；如果甲数缩小5倍，要使商不变，乙数应当（也缩小5倍）
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