1+3/4-3/5
=7/4-3/5
=23/20
答:这个数是1又20分之3
8/21-2/7=2/21
答:乙是21分之2
一个数加上5分之3,再减去4分之3,等于1,求这个数是多少?
一个数加上5分之3,再减去4分之3,等于1,求这个数是多少?
甲数减乙数的差是7分之2,甲数是21分之8,乙数是多少?
甲数减乙数的差是7分之2,甲数是21分之8,乙数是多少?
数学人气:644 ℃时间:2019-10-19 20:57:01
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