一根绳子,用去2/3米,还剩下2(3/4)米,这根绳子一共长多少米?2W7@.y9V-g1t(p.]1q:o6_)a1i
算式:提示:L4?(?){2i.\:?-z1a5^2W7@.y9V-g1t(p.]1q:o6_)a1i
答:这根绳子一共长8]6Q+_;U3p9R米。2W7@.y9V-g1t(p.]1q:o6_)a1i