2.1 Addition Properties

7 + _ = 8 + 7

12 + _ = 12

3 + (8 + _) = (3 + 7) + 8

Match the following

• 5 + 0 = 5

• difference

• 2 + (6 + 8) =

  (8 + 2) + 6

• Associative Property

• 9 + 4 = 4 + 9

• sum

• the result of subtraction

• Commutative Property

• the result of addition

• Identity Property of Addition

16 + (8 + 4) =

57 + 0 =

(62 + 35) + 8 =

Mrs. Jackson bought 27 blue notebooks and some red notebooks. Mr. Mendez bought 19 blue notebooks and 27 red notebooks. They bought the same number of notebooks. How many red notebooks did Mrs. Jackson buy? *no label

Can the commutative property be used with subtraction?

• yes

• no

Reorder the following, greatest to least

• 7304

• 7340

• 743

• 734

• 7034