哥哥今年12岁，小明7岁，哥哥比小明大几岁？两年前小明比哥哥小几岁？2k,v/}:T2q-b2X;k;p-y2n3g0p3]+J+n
算式：提示:\4}+@5}*B-B2k,v/}:T2q-b2X;k;p-y2n3g0p3]+J+n
答：哥哥比小明大,h4@3O/k-}6^岁。2k,v/}:T2q-b2X;k;p-y2n3g0p3]+J+n
答：两年前小明比哥哥小4s)N5_)Z7a5\;s5H-U7W1B岁。2k,v/}:T2q-b2X;k;p-y2n3g0p3]+J+n