3rd grade Go Math lesson 1.5 Use Properties to Add

Open Ended

What does "properties" mean in Math?

Open Ended

Andy sees a computer printer with a price of $115. What is the price of the computer printer rounded to the nearest ten?

Multiple Choice

Which of the following expressions demonstrates the commutative property of addition?

• 4 + 7 = 7 + 4

• (3 + 5) + 2 = 3 + (5 + 2)

• 6 + 0 = 6

• 2 × (3 + 4) = (2 × 3) + (2 × 4)

Multiple Choice

Which property allows you to add numbers in any order and still get the same sum?

• Commutative Property

• Associative Property

• Distributive Property

• Identity Property

Multiple Choice

Which property allows you to group addends in different ways and still get the same sum?

• Associative Property

• Commutative Property

• Distributive Property

• Identity Property

Fill in the Blanks

The Associative Property of Addition says that (5 + 9) + 11 =

Open Ended

What is the definition of Associative Property in your own words.

Fill in the Blanks

Mrs. Gomez sold 23 cucumbers, 38 tomatoes, and 42 peppers at the Farmers’ Market. How many vegetables did she sell in all?

Open Ended

Albert adds 7 and 3 first and then adds 8. If you add 3 and 8 first and then add 7, will you get the same answer? Explain.

Multiple Choice

Which of the following is the correct sum for 11 + 16 + 19 + 14?

• 60

• 50

• 70

• 40

Multiple Choice

What is the associative property of addition?

• Changing the grouping of three or more addends does not change the sum.

• Changing the order of addends changes the sum.

• Addition is only possible with two numbers.

• The sum is always even.

Open Ended

Why is it possible to change the order in which you add the addends even though the parentheses show two of the addends grouped together?

Open Ended

Explain how the Commutative and Associative Properties of Addition are alike and how they are different.

Fill in the Blanks

A pet shelter has 26 dogs, 37 cats, and 14 gerbils. How many of these animals are in the pet shelter in all?

Multiple Choice

Which of the following is the correct sum for 57 + 62 + 56 + 43?

• 218

• 210

• 208

• 220

Open Ended

How can you add more than two addends?

Open Ended

How can using properties of addition, such as the commutative or associative property, help you solve addition problems more efficiently?

Fill in the Blanks

What is the price of the computer printer rounded to the nearest ten?