CPA 1 Study Guide

Chloe owes her dad $7.25 that she borrowed for food. She earned $4.50 for doing some chores.

What calculation best represents Chloe's situation?

• 7.25 - 4.50

• -7.25 + 4.50

• -7.25 - 4.50

• 7.25 + 4.50

Tags

CCSS.7.NS.A.1C

Mrs. Mohammed is standing on -25 and a student is standing on the additive inverse of -25.

On what number is the student standing?

• 0

• 25

• -25

• 15

Tags

CCSS.7.NS.A.1B

Which number line diagram represents the operation

(-2) - (-6) ?

• A

• B

• C

• D

Answer explanation

Remember, when you subtract, add the opposite

(-2) - (-6) should be rewritten to

(-2) + 6

* You also cannot have a double negative

the subtract sign becomes addition and the negative sign becomes a positive sign.

Tags

CCSS.7.NS.A.1B

Which situation would result in 0?

• A

• B

• C

• D

Answer explanation

The answer is C because he HAS $8.28 which is a positive number. Then he is going to BUY some groceries for $8.28 which means subtraction.

Here is the equation

HAS BUYS

$8.28 - $8.28 = 0

Tags

CCSS.6.NS.C.5

A woman is on an elevator that goes 40 floors down, then up 12 floors and back down 25 floors.

Which expression describes the scenario correctly?

• 40 + (-12) + (-25)

• 40 + 12 + (-25)

• -40 + (-12) + 25

• -40 + 12 + (-25)

Answer explanation

The correct answer is D because she goes DOWN 40 floors -40 and UP 12 floors +12 and back DOWN 25 floors

+ (-25)

Below is the equation

DOWN UP AND DOWN

-40 + 12 + (-25)

Tags

CCSS.7.NS.A.3

A man is working construction on a machine 6.9 feet above the ground. He is digging a trench that is 8.7 feet below ground.

Which equation can be used to determine the distance between the man and the bottom of the trench?

• A

• B

• C

• D

Tags

CCSS.7.NS.A.1C

Kelsee correctly rewrite the expression shown below

7 - 4

Which could be Kelsee's expression?

• 7 - (-4)

• 7 + (-4)

• 4 - 7

• 4 + 7

Answer explanation

This question is asking you to find an equivalent expression.

When you subtract, it is the same as adding a negative.

7 - 4 = 3

7 + (-4)= 3

You can also use a number line to see which of your answer choices gives you the same answer as 7 - 4

a.) 7 - (-4) becomes 7 + 4 because you add the opposite. The answer is 11.

b.) 7 + (-4) Different signs subtract 7-4 =3

c.) 4 - 7 becomes 4 + (-7) different signs subtract 7 - 4= -3 Your answer keeps the sign of the number with the largest absolute value.

d.) 4 +7 =11

Tags

CCSS.7.NS.A.1B

Carlos kept the record below of transactions to his checking account.

Which transaction show the greatest change to the balance of the savings account?

• Groceries

• Birthday Check

• Phone Bill

• Sold Text book

Tags

CCSS.7.EE.B.3

Use the number line to help solve the problem.

Binasa has $7 in her wallet. She earns $5 doing chores. Binasa decides to buy a shirt for $12 with her money.

How much money, in dollars, does Binasa have left in her wallet and why?

• $12 because

  7 + 5 = 12

• $14 because

  7 - 5 + 12 = 14

• -2 because

  -7 + 5 = -2

• $0 because

  7 + 5 -12 = 0

Answer explanation

Binasa HAS $7 = positive 7

She EARNS $5 = + 5

She BUYS a shirt for $12 = -12

Below is the equation

HAS EARNS BUYS

7 + 5 - 12 = 0

12 - 12 = 0

Tags

CCSS.7.NS.A.1C

What is the distance between point Y and point Z on the number line?

Tags

CCSS.7.NS.A.1C