乙数比甲数少五分之一，甲数比乙数多（ ？ ） 有好评！
\u7532\u6570\u6bd4\u4e59\u6570\u5c11\u4e94\u5206\u4e4b\u4e00\uff0c\u4e59\u6570\u6bd4\u7532\u6570\u591a\uff08 \uff09\u7532\u6570\u6bd4\u4e59\u6570\u5c11\u4e94\u5206\u4e4b\u4e00\uff0c\u4e59\u6570\u6bd4\u7532\u6570\u591a\uff08 \uff09
\u89e3\uff1a\u8bbe\u7532\u6570\u4e3ax,\u4e59\u6570\u4e3ay,\u5219
\uff08y-x)/y=1/5,\u4e8e\u662f5(y-x)=y, 4y=5x, y/x=5/4
\u6545(y-x)/x=y/x-1=5/4-1=1/4,\u5373\u4e59\u6570\u6bd4\u7532\u6570\u591a1/4.
\u767e\u5206\u4e4b\u4e8c\u5341\u4e94\u3002\u6700\u7b80\u5355\u7684\u7b97\u6cd5\u5c31\u662f\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6bd4\u5982\u7532\u662f8\uff0c\u4e59\u662f10\uff0c\u6216\u8005\u753212\uff0c\u4e5915\uff0c\u5f88\u5feb\u5c31\u80fd\u7b97\u51fa\u6765\u3002\u8981\u60f3\u505a\u89e3\u7b54\u9898\uff0c\u90a3\u4e48\u4e45\u8bbe\u7532\u4e3ax\uff0c\u4e59\u4e3ay\uff0c\u5219y \u2014 x = y / 5 (\u4e94\u5206\u4e4by)\uff0c\u89e3\u5f97y = 5 x / 4 \uff08\u56db\u5206\u4e4b\u4e94x)\uff0c\u5219y \u2014 x = 5 x / 4 \uff08\u56db\u5206\u4e4b\u4e94x\uff09\u2014 x = x / 4 \uff08\u56db\u5206\u4e4bx\uff09\uff0c\u5373\u4e59\u6bd4\u7532\u591a\u767e\u5206\u4e4b\u4e8c\u5341\u4e94\u3002
设甲数是5，则乙数是4(5-4)÷4
=1÷4
=1/4
答：甲数比乙数多1/4
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