Midterm Review

Order of Operations

100

What does PEMDAS stand for?

Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

200

3 × 4 - 2

10

300

8 ÷ 2 + 4²

20

400

12 - (3 × 2)²

-24

500

9 ÷ 3² + 2 x (2 + 1)

7

Integers

100

What are integers?

Positive Whole Numbers

Zero

Negative Whole Numbers

200

Which of the following are not an examples of an integer? -5, -10, 0.2, 0, 2/3, 10000

2/3 and 0.2

FRACTIONS AND DECIMALS ARE NOT INTEGERS. 

300

-5 + -2

-7

400

-81 divided by -9 

9

500

-12 - (-5)

-12 + 5

-7

Algebra Expressions

100

Translate the following: 

• A number is increased by 5

x + 5

200

• If y = 12, evaluate y / 2.

6

300

Combine the like terms: 

• 2y + 10w + 6t – 8m – 15k

• 2y + 10w + 6t – 8m – 15k

400

If x = 1 and b = 2 then what is 3x - b 

3(1) - 2 = 3 - 2 = 1

500

Solve:

3 (2y + 2b + 1)

6y + 6b + 3

Algebra Equations

100

x/4 = 10

x=40

200

2x - 1 = 9

x=5

300

4(2x - 1) = 12

x=2

400

3x + 6 = 7x - 5

x=11/4

500

5(4x + 5) = 4(2x + 4)

-9/12

Definitions

100

What is a variable? Give an example. 

A letter that represents an unknown value. An example is x. 

200

What is a negative number? Example?

What is a positive number? Example 

Negative number is less than 0. Example -2

Positive number is more than 0. Example 2

300

What is an inverse?

The opposite operation of an operaiton. 

400

What order of operation do the following terms go with

sum 

difference 

product

quotient 

addition

subtraction

multiplication

division

500

Difference between algebra expressions and algebra equations?

Similarity between algebra expressions and algebra equations?

Algebra Equations has an equal sign and Algebra Expressions does not. 

Algebra Equations and Algebra Expressions both have letters, numbers and operation signs.