40÷(1/2-1/4)
=40÷1/4
=160米
一条水梁,第一天挖了40m,第二天挖了全长的1/4,这时剩下的与挖好的正好相等.这条水梁长多少米?
一条水梁,第一天挖了40m,第二天挖了全长的1/4,这时剩下的与挖好的正好相等.这条水梁长多少米?
算式要完整
算式要完整
数学人气:486 ℃时间:2019-11-02 00:35:12
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