凉山州2018-2019学年度下期期末统一检测七年级数学试题及答案(20200802193828).

20182019

12

22415BBDDB

610CACBD 1112CC 8

32413.3

-214.315.a -216.2317.1118.3-5

19.420.7

5221.8

41=-1+5-

2-1-2-3..........................2=-1-2+1............................................3=-

2 (422)

6x+8y=10 (1)

-

13y=26

y=2 (2)

y=2

3x+42=5

x=-1 (3)

2

y 1x

................................422.6x

-2...............................................1x 21

(3)

x -2 (4)

(6)

23.6x y (1)

2100

y 250x 15010

y x ........36y 4x .....................546..................................624.81A -1-1B 4,2

C 1,3...........................12S ABC =21

3+54-2131-2153

=16-23-2

15=7 (5)

3

..................7A

1,1B 6,4C 3,5...................825.81

x /y /16000

y 4x 5y

43x 1500y 2000x 2000/1500/ (32)

m m+450000

m 15004m 0002224m

m .......................59m 12....................................................6m

m=9,10,11,12 (7)

4 (8)

26.711010%=100 (2)

2100-10-30-25-9=26 (4)

100

25

360=902

253090..................5.310030

261020=13.2 (7)

2013.2.

26.91

AM BN A+ABN=180A=60ABN=180-60=120BC BD ABP PBN ABP=2PBC PBN=2PBD 2PBC+2PBD=120PBC+PBD=60CBD=60 (42)

APB=2ADB BD PBN PBN=2DBN AM BN APB=PBN ADB=DBN APB=2ADB..............................73ABC=30........................................9.