Chapter 16 Scores

Test 1 score

( 1)

1 b 2 c 3d 4 a 5 a

6.7.8.0.9. 10. 1.

1 1.( 1)a+2b； (2)2 x2； (3)b+ a； (4)x2y2。

(2)

12.( 1) (2) , .

13.( 1) (2)

14.( 1) (2)

15. The simplified formula is 1, and the result has nothing to do with the value of x. 。

(3)

16. 17.x = 0 or 2 or 3 or-1. 18.

Test 2- Operation of Fractions

( 1)

1 . a 2 . d 3 . d 4 . d 5 . d 6 . d 7 . c 8 . b

9.x4y. 10。 1 1.a+b. 12。 13. 14.

(2)

15. 16. Hint: divide by step size.17.2x.18.1.

19. Simplify by substituting x = 2.

(3)

20.A=3，B=5。