The document discusses a math word problem where a used guitar was bought for $50 and five guitar lessons were $10 each. It provides the expression (10 x 5) + 50 and solution of $100 to represent the total cost. It then reviews order of operations and properties of addition like commutative, associative, and identity properties. Finally, it introduces the distributive property and homework assignments.

1. Bell Ringer
You buy a used guitar for $50. You then pay $10 for each of five
guitar lessons.
Write an expression for the problem.
Find the total cost.

2. Bell Ringer
You buy a used guitar for $50. You then pay $10 for each of five
guitar lessons.
Write an expression for the problem.
(10 x 5) + 50
Find the total cost.
$100

3. Where we were…
• Commutative Property of addition
• Order doesn’t matter in addition
• 5 + 1 = 1 + 5
• Associative Property of addition
• Grouping numbers in different ways doesn’t change the sum
• (1 + 2) + 3 = 1 + (2 + 3)
• Identity Property of addition
• Adding 0 to any number doesn’t change the number
• 14 + 0 = 14

4. Where we are…
• Students will learn to…
• Review Order of Operations
• Define and combine terms

5. Vocabulary
• Terms
• Parts of an expression that are added together.
• Why do you think the definition mentions only adding and not
subtraction?
• Order of Operations
• a set of rules used to evaluate expressions with multiple terms

6. 5 + 6 x 5
• The goal for order of operations is to simplify the expression
so that only addition (or subtraction) is left.
• Which operations should I do first? Why?
• 5 + 6 x 5
• 5 + 30
• 35

7. 10 x 3 + 32
• Which operations are most complex?
• Which operations need to be completed in order to leave only
addition?
• 10 x 3 + 32
• 30 + 9
• 39

8. 20 – 42 ÷ 2
• Which operations are most complex?
• Which comes first? Exponent or division?
• You can’t use the quantity of 42 until it is simplified.
• 20 – 16 ÷ 2
• 20 – 8
• 12

9. 18 – 10 + 5 - 1
• Which is the most complex operation?
• They subtraction and addition are equally complex…
subtraction can be changed to addition
• Work left to right…
• 18 – 10 + 5
• 8 + 5 - 1
• 13 – 1
• 12

10. Order of Operations
1) Evaluate expressions inside grouping symbols
2) Evaluate powers
3) Multiply and/or divide from left to right
4) Add and/or subtract from left to right

11. Homework
• Pg. 19
• #1-2, 6, 8, 15-16, 43
• 7 Problems
• Tell me your book #
• Due on Friday

12. Where we were…
• Properties of addition
• Commutative Property
• Associative Property
• Identity Property
• Addition and Subtraction of Integers
• Adding the opposite can change all subtraction problems to
addition.
• Order of operations

13. Where we are…
• Students will learn to…
• Study the distributive property
• Describe how the distributive property works

14. Partner Activity
• Read the article
• Alternate paragraphs with your partner
• On a separate sheet of paper, answer the questions in the
magazine.
• Once you are finished, come get a worksheet
• Answer the questions with your partner
• Staple your paper and worksheet together and hand it in
before you leave.

15. Exit Ticket – Twitter summary
• Pick a number: 1, 2, 3 or 4 and write it on your twitter
summary sheet.
• Answer the question with the same number you picked.
• 1) Describe and give an example of the commutative property of
addition.
• 2) Describe and give and example of the associative property of
addition.
• 3) Describe and give an example of the identity property of
addition.
• 4) Describe order of operations.