两名运动员在湖的周围环形道上练习长跑．甲每分钟跑250米，乙每分钟跑200米，两人同时同地同向出发，经过45分钟甲追上乙；如果两人同时同地反向出发，经过多少分钟两人相遇？
直接写出得数． 3×=÷0.5= 9÷=÷﹣= （1﹣）÷= 2÷×=
直接写得数．×6= 30×=÷= 20÷=+=××0=×= 1÷×= 5.6÷0.08= 39××=
直接写得数．﹣=÷=×=×= 10×=×=÷=÷= 15×=÷=+=÷22=
直接写出得数．=========．
直接写出得数．÷10=×= 1÷= 8×= 1+=÷=×÷= 1÷6×=
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