Download MAT 0002 REVIEW SECTION 2.5 (Multiplying and Dividing Integers

MAT 0002 REVIEW SECTION 2.5 (Multiplying and Dividing Integers)
SHORT ANSWER. Write the word or phrase that best
completes each statement or answers the question.
Multiply.
1) -4(18)
Divide.
28) -36 ÷ 9
2) -20(2)
29) 24 ÷ (-6)
3) -7(-2)
30) -42 ÷ (-3)
4) -3(15)
31) -66 ÷ 3
5) 0.8(-0.6)
6) 0(-17)
7) 0(-16)
8) -
1
3
5
7
9) -
7 5
8 6
3 2
2
27) -
32)
-63
7
33)
63
-9
34)
-48
-6
35)
-171
9
36)
120
-5
37)
-144
-6
10) -3(-5)(3)
11) 7(-4)(-4)
12) -4(-4)(6)
13) -3(-8)(-5)
38) -245 ÷ 49
14) 9(-1)(3)(-5)
39) 864 ÷ (-96)
15) -16(0)(-9)(5)
Evaluate.
40)
-7
0
41)
-15
0
42)
0
53
43)
-0.6
0.2
44)
40
-1
45)
300
-0.6
16) (-13)2
17) (-3)4
18) -8 2
19) -5 4
20) (-5)3
21) -9 3
22) (-6)3
23) -6 5
46) -
24) (-1)24
25) -1 10
47)
26) (-1)23
1
5
3
÷ 7
4
2
3
÷ 13
7
48) -
64) In 1998, Little City Productions produced and
sold 2532 thousand of its Little City Collectible
Bears. In 2003, the number of these bears
produced and sold had dropped to 452
thousand. Find the change in the number of
bears produced from 1998 to 2003, and find
the average change per year in the number of
bears produced over this period.
2
1
÷
13 6
Evaluate the expression for the given replacement values.
49) xy
for x = 1, y = -2
50) xy
Solve.
for x = 0, y = -66
51)
x
y
for x = -48, y = 3
52)
x
y
for x = 0, y = -34
53)
x
y
for x = -32, y = 0
65) The graph shows the melting points in degrees
Celsius of three compounds: Compound A,
Compound B and Compound C.
54) Find the quotient of -18 and 2.
55) Find the quotient of -63 and -7.
The melting point of Compound D is -3 times
the melting point of Compound A. Find the
melting point of Compound D.
56) Find the product of -6 and -14.
57) Find the product of -19 and 17.
Without actually finding the product, write the list of
numbers in order from least to greatest.
66) (-3)18, (-3)19, (-7)18, (-7)19
58) A football team lost 8 yards on each of two
consecutive plays. Represent the total loss as
product of signed numbers and find the total
loss.
67) (-1)54, (-1)59, 0 12, (-8)22, (-8)27
59) A checking account had a beginning balance
of $1381. A deposit was made in the amount
of $1559. Every month for 15 months $30 was
withdrawn. How much money was left in the
account at the end of the 15 months?
60) Ben lost $452 on each of 5 consecutive days in
the stock market. If he had $16,057 before his
loss, how much does he have after his loss?
61) Richard owns 60 shares of a stock whose value
went down $1.50 per share. He also owns 35
shares of a stock whose value went up $0.60
per share. How much did Richard gain or
lose?
62) A weather forecaster predicts that the
temperature will drop 2 degrees each hour for
the next 7 hours. If the temperature is 47°F
before the temperature starts falling, what is
the temperature after the drop?
63) Sara recorded the following temperature
readings in degrees Fahrenheit at 7 A.M. each
morning for eight days in a row: -10°, -12°,
-2°, 3°, 6°, -1°, -19°, and -21°. What was the
average temperature? Round to the nearest
hundredth when necessary.
2