AnswersPre-Algebra - MA3119 A Distance LearningAdding Integers

Adding Integers Answers

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Which expression has the same value as the one below?

Question illustration
A
12 + (negative 9)
Option A
B
Negative 12 + 9
Option B
C
Negative 4 + (negative 9)
Option C
D
4 + (negative 9)
Option D
2
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The temperature at 9 a.m. is 2 degrees. The temperature rises 3 more degrees by noon. Which expression describes the temperature at noon?

A
2 + 3
Option A
B
2 + (negative 3)
Option B
C
Negative 2 + (negative 3)
Option C
D
Negative 2 + 3
Option D
3

A meteorologist used the expression below to describe how the temperature changed. Which statement could describe how the temperature changed?

Question illustration
A
The temperature was –5 degrees, then it increased 4 degrees.
B
The temperature was –5 degrees, then it decreased 4 degrees.
C
The temperature was 5 degrees, then it increased 4 degrees.
D
The temperature was 5 degrees, then it decreased 4 degrees.
4

What is the value of the expression?

Question illustration
A
Negative 28
Option A
B
Negative 4
Option B
C
4
D
28
5

Rita is adding . She rewrites the expression as . What is Rita’s error?

Question illustration
A
She used the commutative property, which cannot be used with negative numbers.
B
In the new expression, –8 and 1 should both be negative.
C
She used the associative property which should only be used with positive numbers..
D
She switched the negative signs for –8 and 1.
6

Sean says that to add a number to –100 and still have –100 is to add zero. Candice says that she can add two numbers to –100 and still have –100. Who is correct and why?

A
Sean is correct because adding any numbers other than zero will result in a different number.
B
Candice is correct because if the two numbers total 100, then the sum will be –100.
C
They are both correct because adding two numbers that are opposites is equivalent to adding zero.
D
Neither is correct because adding any number to –100 will result in a different number.
7

Indira is using a number line to add . She begins by showing –1 on the number line, as shown below.What is the sum of ?

Question illustration
A
–4
B
–3
C
2
D
3
8

Morena, a scuba diver, used the expression below to describe her position in relation to sea level.Which statement could describe the diver’s movements?

Question illustration
A
Morena started at 15 feet below sea level, then dove down 6 more feet.
B
Morena started at 15 feet above sea level, then dove down 6 more feet.
C
Morena started at sea level, dove down 15 feet, then dove down 6 more feet.
D
Morena started at sea level, dove down 15 feet, then rose up 6 feet.
9

Which expression has the same sum as the one below?

Question illustration
A
15 + 6
Option A
B
Negative 6 + (negative 15)
Option B
C
15 + (negative 6)
Option C
D
6 + (negative 15)
Option D
10

A scuba diver used the expression below to describe his position in relation to sea level.Which statement could describe the diver’s movements?

Question illustration
A
Starting on a platform 2 feet above sea level, dive down to a location that is 18 feet below sea level, and then rise 8 feet.
B
Starting on a platform 2 feet above sea level, dive down to a location that is 20 feet below sea level, and then rise 8 feet.
C
Starting 2 feet below sea level, dive down 20 more feet, and then rise to a location that is 8 feet below sea level.
D
Starting 2 feet below sea level, dive down 18 more feet, and then rise to a location that is 8 feet below sea level.

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