25\r:8x=0.36x25\rx=9+8\r4 0 2 X4\r|
z ?w 9 w 73I\r41-15 6789\r41-25 67389\r42-1389\r42-289\r42-3389\r42-4389\r43-1 %&1$'\ru 1 3 v w 1 5 v.\r4 :; 45<=>?@xA?.\rx : 45=100 : 15\r15x=4500\rx=300\r300>280\r432C k45D E F 9 280T*.\r4 :150.4=6, 8+0.4=20 , 10+0.4=25,0.4=40% , GF:\r44-1B = IJ = 8 - ?20= 1 0 ?25= ?40II\r4 kl + 3 + 3 = 770x 5 =10cm\r45-1K 6LM"/N ?O10P?.\r46-2\r%&1$'4\r47-1 %&2 $ '1:50000\ru 1 4 v w 1 5 v.\r4 :1500m= 150000cm . 1000m=100000cm , 150(XX)x =3 (cm ) t\r47-2 >\r0 :;QRSTU\r48-1 40*10x-40 *15 x-12\r4 6VW61200x1=480X YZ [ 67 0 0 / =300X Y\]^67 0 0 ,4 =420X \r49-1.\ru 1 5 v w 1 5 v
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