How many four-digit positive integers are there with thousands digit
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How many four-digit positive integers are there with thousands digit
How many four-digit positive integers are there with thousands digit
How many four-digit positive integers are there with thousands digit
问题是【4位数的正整数中有多少个的千位数是2的?】
答:2000到2999之间的数字都符合条件,所以共有2999-2000+1=1000个,即【one thousand integers.】
问题翻译:有多少个4位正整数的千位为2?
How many four-digit positive integers are there with thousands digit
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