10\rk C C B C C B B B C B\rng\r11. 12\r12. 8ab\r13. 5\r14. \r1\r15. x\r7\r16. 1000\r17. 100 25 \r1 8 . \r19. 24 5 4.8\r20. 60\rn ¡g\r21. X\r2 2 . ¢£\r2 3 . ¢£\r2 4 . ¢£\r2 5 . ¢£\rn¤¥g.\r26. k«P\r~ @ 1¦§¨© ~@2 ª§¨©\r¥2 4 3.\rnjkg\r2 7 . U'?./&' 0 8X 7=56&' ¬ ®NO./&' 0\r2. 5X7+2=8.75 (&' ) ¯?./0(8X2+2. 5) X 7+2=64. 75(&' )\r28. 6 "#\r29. 8x3.5=16.8 23. 94-63=0. 38\r30. 8 \r3 1 . `YZ./[\]0 5. 7 [\](k«P)\r32. 200 z 2200 \r33. ( 1)jn=±\r( 2 ) jx=8\r}n 9g\r12\r34. (124-3) 2z (12+3) X (124-3)z ( P ) 0\r3\r35. (1) x=0.5 (2) x=9 (3) x=1.2