Math Open Up Resources Unit 2

Unit 3 Review (Semester A)

Mr. Richards

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​Order of Operations

• ​Used when solving a problems with multiple steps

• ​Work from left to write when multiplying and dividing, or adding and subtracting.

Multiple Choice

Which operation would you do first in the following equation?

10 - 4 ÷ 1 x 5

• Subtraction

• Division

• Multiplication

• Addition

Multiple Choice

True or false:
Addition ALWAYS comes before subtraction.

• True
• False

Multiple Choice

(7 x 5) + (6 x 4)

• 48
• 69
• 59
• 72

Multiple Choice

What is 3²?

• 6
• 12
• 9
• 1

Multiple Choice

10 + 45 ÷ 9 -(14 ÷ 2)  = 

• 9
• 8
• 53
• 18

​Integers and Absolute value

• ​Integers: the set of all positive and negative numbers

• ​Absolute value

• ​Numbers lines can go horizontal (sideways) or vertical (up and down)

• ​The bigger a negative number, the smaller in value.

Multiple Choice

Which city was coldest?

• A

• B

• C

• D

• E

Multiple Choice

Put these integers in order from least to greatest.

• 8,4,1,0,-3,-6

• 8,4,1,0,-6,-3

• -6,-3,0,1,4,8

• -3,-6,0,1,4,8

Multiple Choice

Which statement is true?

• The absolute value of 3 is -3
• The opposite of 7 is 7
• The absolute value of 5 is equal to the opposite of 5
• The opposite of -4 is equal to the absolute value of -4

​Integer Operations

• ​Adding, subtracting, Multiplying, and Dividing positive and negative numbers.

Multiple Choice

7 + (-13)

• -6

• 6

• -20

• 20

Multiple Choice

-4 - 16

• -20

• 20

• -12

• 12

Multiple Choice

-5 x 9

• -45

• 45

• 4

• yellow

Multiple Choice

-32 / 8

• 4

• -4

• 256

• -256

Solving one step equations

• ​Use inverse operations to solve

• ​The goal is to get the variable isolated (By itself)

Multiple Choice

What would be the best first step to solving the equation?
-6x=-24

• multiply both sides by -6
• divide both sides by -6
• add 6  to both sides
• subtract -6  from both sides

Multiple Choice

What would be the best first step to solving the equation in one step?

• multiply both sides by 3
• multiply both sides by -3
• divide both sides by -3
• add 3 to each side

Multiple Choice

Solve for x:

• x = 20
• x = 7
• x = 10
• x = 3

Multiple Choice

Solve the equation:

2p = 16

• p = 32

• p = 12

• p = 18

• p = 8

Multiple Choice

$$k+19=10$$   

• k = 190

• k = -9

• k = 29

• k = 10/19

​Number Properties

Multiple Choice

Which property is this an example of?
6 x 7 = 7 x 6

• Associative Property of Multiplication
• Commutative Property of Multiplication
• Inverse Property of Multiplication
• Distributive Property

Multiple Choice

Rewrite (9 x 6) x 5 using the associative property.

• 270
• 9 x 30
• 9 x (6 x 5)
• 5 x 9 + 5 x 6

Multiple Choice

Which of these illustrates the zero property of multiplication?

• 4 x (5 x 6) = (4 x 5) x 6
• 6 (9 + 1) = (6 x 9) + (6 x 1)
• 4 x (56) = (45) x 6
• 5 x 0 = 0

Multiple Choice

This property tells us that when we change the order of numbers when we are adding, the answer does not change.  

• Commutative Addition
• Commutative Multiplication
• Associative Addition
• Associative Multiplication