1. Properties of
Addition

2. Bell Ringer
• Determine the missing number…
• 1) 75 + 12 = 80 + x
• x =
• 2) 101 – 49 = x
• x =
• 3) 289 + 0 = x + 289
• x =

3. Bell Ringer
• Determine the missing number…
• 1) 75 + 12 = 80 + x
• x = 7
• 2) 101 – 49 = x
• x = 52
• 3) 289 + 0 = x + 289
• x = 0

4. Where we were…
• Adding Integers
• Number Line, context, rules
• Subtracting Integers
• Number Line, context, Add the opposite and use rules for
addition
• Absolute Value
• Additive Inverse

5. Where we are…
• Students will learn to..
• Review the properties of addition and determine which property
is in use.
• Demonstrate their knowledge of adding and subtracting integers.

6. Commutative Property of
Addition
• Allows you to switch the order of addition problems without
changing the sum.
• 6 + 5 = 5 + 6
• 11 = 11

7. Associative Property
• Changing the grouping of numbers in an addition problem
does not change the sum.
• (6 + 3) + 5 = 6 + (3 + 5)
• 9 + 5 = 6 + 8
14 = 14

8. Identity Property of Addition
• The sum of zero and any number will be that number.
• 14 + 0 = 14
• 0 + 14 = 14

9. Exit Ticket – Power Write
• In words, describe the Commutative Property of addition.