观察下面操场跑道的平面图，根据

观察下面操场跑道的平面图，根据所提供的信息，解决问题。0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

1．试算操场跑道的最里道的内道线一周大约长多少米？0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

2．丽丽和贝贝比谁跑得快，丽丽在最里道从A处起跑，贝贝跑从里向外的第三道，终点线为AB，为了比赛公平，贝贝的起跑点要比丽丽的提前多少米？0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

3．若有6名同学依次站在1，2，3，4，5，6道上进行如上的400米跑比赛，每相邻两道的起跑线相距多少米？0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

1．

算式：提示6A5V;\)m+l(A8~'t9X6^,^7i1^0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

答：一周大约长9v/^1_:K-_8E-}+y1a1j0C:Y0@2Q米。0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

2．

算式：提示/P']*@;~5I:k7B2Y/{+T2~0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

答：提前,b/W(O4T+V6d,g+t+q1z1T9~米。0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

3．

算式：提示3I8H4p9e4l.F9{0C0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S

答：每相邻两道的起跑线相距7V2K3P-x4{.k0x米。0c1{;A(U)f+O2T(W4o5V5e0s+N,K-S