6,7,6,7,
6,7,第七题240÷(70除以8分之7)=3
6.汽车速度:70/(7/8)=80km/h, 240/80=3h7.梨:25*(4/5)=20,青枣:20/(2/3)=30箱8.长为:36/2*(5/9)=10 宽为:36/2*(4/9)=8面积为:10*8=80平方分米