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小学趣味数学之八 甲、乙两数的和是638，把甲数的小数点向左移动一位就得到乙数。甲、乙两个数各是多少? 分析:甲数的小数点向左移动一位，就是缩小十倍的意思，这时得到的数与乙数相等。 由此可知，甲数是乙数的十倍，假设乙数占1份，则甲数占10份。 甲、乙两数之和是638，把638平均分成11份，即 ：甲数580的小数点往左移动一位即58，与乙数相同。所以甲数是580，乙数是58。
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