Download 6 week DCA Test Review

6 week DCA Test Review
1.
Simplify:
2.
 (3(9  4) 
 6  11  + (-7)
7.
-2 + n = -19
8.
n
= - 18
3
9.
3x + 4 = -32
10.
Write a fraction multiplication
expression to represent the model:
for c = -3
a. -9
b. -5
3.
a. 22
for a = –1 and b = –3
b. –22
c. 8
d. –8
4.
a. 6
Solve showing all steps:
c. 5
d. 9
for x = –8 and y = –6
b. 1
c. 9
d. 4
5. You have $20 to spend. You buy socks
that cost $3 per pair.
a. Write an expression for the amount
of money you have left after buying s
pairs of socks.
11. Illustrate the following multiplication
problems using the arrays provided:
a.
1
2
x
2
3
b.
1
3
x
3
5
_______________________________
b. How many pairs of socks did you buy if
you have $8 left?
_______________________________
6. Simplify:
a. 71
b. –19
c. –41
d. 49
12. Match each point with one of the
following rational numbers:
–0. ,
,
A
, 0.925.
B
C
16. Explain how you could predict the
sign of the product of –8, 9, 7, and –
4 without actually multiplying.
D
–1
__________________________________________
0
A____ B____ C____ D____
17. Why is the absolute value of a
number always positive?__________
1
4
13. Paul needs 2 yd of fabric to make a
tablecloth. How many tablecloths can he
1
4
make from 20 yd of fabric?
a. 9 tablecloths
c. 8 tablecloths
b. 10 tablecloths
d. 11 tablecloths
18. If the model below represents the
equation x + 3 = 5, what is the value
of x?______
1
2
14. Sue needs 1 cups of flour for a
batch of cookies. How many complete
batches can she make with 20 cups of
flour?
a.
12 batches b.
11 batches
c.
14 batches d.
13 batches
15. The table below shows the scores for
two teams playing a series of four card
games.
Team 1
Team 2
Game 1
Game 2
Game 3
Game 4
13
–15
8
–9
–12
13
12
–13
a.Find the totals for each team after
two games.
b.If the winner is the team with the
greater score, which team is winning
after two games?
c.Would the results be any different
after all four games? Why or why not?
19. If the model below represents the
equation 3n = 9, what is the value of
n?______
20. Use the number line to draw a model
of the expression 4 – 7.
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
21. Use the number line to draw a model
of the expression -3 + 5
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8