Name That Property
What property is shown?
7 + 4 = 4 + 7
What is Commutative Property of Addition?
Use the Commutative Property to complete:
8 + 15 = ___ + ___
What is 15 + 8?
Use a property to make this problem easier:
9 + 37 = ?
What is 37 + 9=46?
A student says:
8 − 3 = 3 − 8 because subtraction is commutative.
Is the student correct?
What is No. Subtraction is not commutative.
What property is shown?
(3 + 5) + 2 = 3 + (5 + 2)
What is the associative property?
Use the Commutative Property to rewrite:
27 + 14 = ___ + ___
What is 14 + 27?
What is 58?
A student says:
(20 − 5) − 3 = 20 − (5 − 3) because subtraction is associative.
Is the student correct?
What is "no, subtraction is not associative?"
What property is shown?
46 + 0 = 46
What is the identity property?
Use the Identity Property to complete:
32 + ___ = 32
What is 0?
67 - 67 = _____?
What is 0?
Mia has 24 stickers and gets 16 more. Her friend says she can solve 24 + 16 by switching the numbers to 16 + 24. What property is she using?
What is the commutative property?
What property is shown?
12 + 9 = 9 + 12
What is the commutative property?
Complete the equation using the Associative Property:
(25 + 15) + 5 = 25 + (___ + ___)
What is 15 + 5?
41 + ____ = 53
(You must explain how you solved for the missing addend).
What is 12?
What is "Subtract 53 minus 41?"
A teacher has 35 pencils and then receives 0 more pencils. How many pencils does she have? What property helps explain this?
What is the identity property?
What property is shown?
(10 + 6) + 4 = 10 + (6 + 4)
What is the associative property?
Use the Associative Property to complete:
(4 + 7) + 6 = 4 + (___ + ___)
What is 7 + 6?
Use the Associative Property to solve mentally:
17 + 13 + 7 + 3
What is (17+13)+(7+3)=40?
A school library has 125 fiction books and 75 nonfiction books. Then it receives 25 more fiction books and 25 more nonfiction books. Use properties of addition to make this problem easier to solve mentally.
What is (125 + 75) + (25 + 25) = 200 + 50 = 250 books?