Associative Property Day 2 Click the link to play some fun math games!

 During the presentation please listen carefully.  Try your best.  Be respectful of your classmates.  If you have a question, please raise your hand or type it in the chat box.

 A: Use the concept of equality and concrete objects to demonstrate understanding of the commutative and associative properties. Essential Question:  How do I identify the Associative Property, and how does this property help me with my math?

Math Giggles....

 The Commutative Property states that you can add numbers in any ______________ to get the same sum. You can also multiply numbers in any _________________ to get the same product.  The Associative Property states that you can ________________ numbers in different ways when adding and get the same sum. You can also _______________ numbers in different ways when multiplying and get the same product. Word Bank

(5 + 4) + 6 = 15 and 5 + (4 + 6) = 15 We can also show this as one number sentence... (5 + 4) + 6 = 5 + (4 + 6) When adding 3 numbers, we can group two numbers together to make it easier to add. Remember to do what is inside of the parentheses first!

(12 + 8) + 7 = ? + 7 Remember to start with the numbers inside of the parentheses first!

6 + (6 + 4) = ? 6 +

8 + (10 + 2) = ? 8 +

(5 x 2) x 4 = 40 and 5 x (2 x 4) = 40 We can also show this as one number sentence... (5 x 2) x 4 = 5 x (2 x 4) Just like with addition, we can group numbers to make it easier to multiply!

 Draw an array  Think of your cookies  Use a multiplication chart-- let’s take a closer look at this... How can I find the answer to 4 x 2?

Look for the first number across the top. Look for the second number on the left. What is 2 x 4? Follow the numbers until they meet to find your answer!

(3 x 2) x 6 = ? x 6

(1 x 5) x 4 = ? x 4

8 x (5 x 2) = ? 8 x

 Now we are going to try some multiple choice questions about the associative property.  You will use your polling tools to choose A, B, C, or D as your answer.

3 + (4 + 5) = (3 + ___) + 5  5  4  3  9

(5 x 2) x 3 = ___ x (2 x 3)  7  30  5  2

(5 x 10) x 2 = 5 x (10 x ___)  10  50  5  2

If 5 + (7 + 3) = 15, What is (5 + 7) + 3?  12  5  15  20

If ( 2 x 4) x 1 = 8, What is 2 x (4 x 1)?  4  8  9  16

 Now it’s time for you to try some on your own.  I will push out the Compass website to you so that you can complete your post test or extension activity..

 Log in to Compass with your username and password.  Click on Math Assignments.  Choose the folder: M2.A.2.8.2_Associative_Post or Extension  Complete the post test. When you finish, make sure that you click and then “turn-in” to turn in your test.