P33 1. (1)9:24=3:8(2)1/2:1/3=3/4:1/2(4)0.9:0.3=15:52.3.14 6.28 9.42 12.56 略3.X=9 X=1/30P34 1.CB2 1:60000003. 5:14.(1)1:20000(2)略P35 1.(1)300 1/300(2)120 202 140km3.4000平方米4.210km