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小灵通说:“你任意写一个首、尾数字不相同的三位数,然后再与这个数的逆序数相减(大减小),只要将差的末尾数字告诉我,我便能知道差的全部数字。”
PHS said: “You arbitrarily write a different first and last three digits, and then subtract the number of reverse order (big reduction), as long as the poor end of the figure to tell me, I will know All the bad numbers. ”