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二年级数学下册三《生活中的大数》数一数课课练（无答案）北师大版.doc

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1数一数课课练1.有一个三位数，各个数位上的数字之和等于 24，符合这个条件的三位数有哪些？2一个四位数，最高位上的数字是 3，十位上的数字是 5，任意相邻的 3 个数字的和都是 12，这个四位数是多少？3有一个三位数，百位数字是个位数字的 3 倍，十位数字是百位数字的 2 倍，这个三位数是多少？

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