黑龙江省大庆市杜尔伯特县2017_2018学年八年级数学上学期期末考试试题新人教版五四制.doc

1、 2017-2018 2017-2018 1. B 2. A 3.D 4. A 5.A 6.C 7.D 8.C 9. D 10.A 11. 12. 2 13. 9 14. m 3 15. y 16. 10 17. -2 18. -1 19. x - 1 20.8 21. 6 = 2a a 2 4a+4 -3 = 2a a 2 2 -6 22. 7 x -1 -2 x 2 -4 1 x 2-6 1 0 1-7 23. 7 = -2 = -4 = x+1-6 x=2 = 2+1= 1-7 24 7 4 3 25. 7 ) 2 )( 2 ( x x 16 ) 2 )( 2 ( ) 2 ( 2 x x

2、 x -2 x= 2 -4 x= 2 ) 2 )( 2 ( x x =0 -5 x= 2 -7 26. 8 x 1.5x 1200 x 1200 1.5x =10-3 x=40- -5 x=40 -6 -7 40 60 . -8 27. 9 1 x 650 x -3 x 425- -4 x 200- -5 x 200 x 425-6 2 y y=3x+4 650 x =3x+2600 4x= x+2600-7 y= x+2600 k= 1 0 y x x=200 -8 650 x=650 200=450-9 200 450 28 9 1 ABC ADF AF=AD AB=AC FAD= FAB= FAD BAD DAC= BAC BAD FAB= DAC-1 AFB ADC AFB ADC SAS -2 2 AFB ADC ABF= -1 BAC= ABF= BAC-2 FB AC BC EF BCEF -3 3 ABC ADE AF=AD AB=AC FAD= FAB= FAD BAD DAC= BAC BAD FAB= DAC-1 AFB ADC AFB ADC SAS -2 ABF= ADC ADC+ EAF+ ADC= EAF -3 AFB= EAF BF AE BC EF BCEF -4