AnswersCommon Core Math 7 - MA3107 CRPercent Increase and Decrease

Percent Increase and Decrease — Unit test Answers

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Dan is using tiles to add . He begins with the tiles shown below.What is the sum of ?

Question illustration
A
–14
B
–2
C
2
D
14
2
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Hector must find the sum of by using mental math. Which property allows Hector to simplify the equation to and find an equivalent sum?

Question illustration
A
associative property
B
commutative property
C
distributive property
D
identity property
3

Which number is the additive inverse of –5?

A
–
Option A
B
0
C
Negative one-fifth
Option C
D
5
4

Rashal is adding the expression below.First, he rewrites the expression.Which number property did Rashal use to rewrite the expression?

Question illustration
A
associative property
B
commutative property
C
distributive property
D
identity property
5

Which expression has the same value as ?

Question illustration
A
Negative 18 divided by 2
Option A
B
Negative 12 divided by (negative 3)
Option B
C
Negative 10 divided by 5
Option C
D
Negative 8 divided by (negative 4)
Option D
6

Ms. Chin asked her students to use the properties of multiplication to rewrite the expression . The table below shows the properties that each of four students used to rewrite the expression.Expressions Generated by StudentsStudentProperties used to rewrite the expressionMitulCommutative propertyStacyAssociative propertyTomAssociative property and then the commutative propertyWaltCommutative property and then the associative propertyHow many of the students created an expression that was equivalent to the original?

Question illustration
A
one
B
two
C
three
D
four
7

What is the difference between the absolute value of –8 and the absolute value of 6?

A
2
B
8
C
14
D
16
8

Which expression has a negative value?

A
2 + 12
Option A
B
(negative 3) (negative 8)
Option B
C
10 minus (negative 18)
Option C
D
Negative 35 divided by 5
Option D
9

Yasmine finds the absolute value of –655. Which expression represents this value?

A
0 + (negative 655)
Option A
B
0 minus (negative 655)
Option B
C
(negative 655) + 655
Option C
D
(negative 655) minus 655
Option D
10

Dylan scored a total of 48 points in first 4 games of the basketball season. Which equation can be used to find g, the average number of points he scores per game?

A
48 divided by 4 = g
Option A
B
4 divided by 48 = g
Option B
C
g divided by 4 = 48
Option C
D
4 divided by g = 48
Option D
11

When multiplying two negative integers, what is the sign of the product?

A
positive
B
negative
C
zero
D
one
12

What is the difference between –4 and 6?

A
–10
B
–2
C
2
D
10
13

What is the product?

Question illustration
A
–82
B
–72
C
72
D
82
14

How is the product of 4 and 2 shown using integer tiles?

A
4 positive tiles and 2 positive tiles.
Option A
B
4 negative tiles and 2 negative tiles.
Option B
C
4 sets of 2 positive tiles.
Option C
D
4 sets of 2 negative tiles.
Option D
15

Which product is modeled by the number line below?

Question illustration
A
(negative 3) (4)
Option A
B
(negative 2) (4)
Option B
C
(2) (4)
Option C
D
(3) (4)
Option D
16

Which addition does the model below represent?

Question illustration
A
8 + (negative 3)
Option A
B
2 + (negative 3)
Option B
C
5 + 3
Option C
D
5 + (negative 3)
Option D
17

What is the product of 25 and –6?

A
–150
B
–19
C
19
D
150
18

What is the absolute value of –8? Use the number line to help answer the question.

Question illustration
A
–16
B
–8
C
8
D
16
19

Which expression has the same value as the one below?

Question illustration
A
22 + (negative 22) + (negative 10)
Option A
B
22 + (22) + (negative 10)
Option B
C
22 + (negative 22) + (10)
Option C
D
22 + 0 + 32
Option D
20

What is the value of ?

Question illustration
A
–6
B
–2
C
14
D
22

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