2.1 Addition Properties

7 + _ = 8 + 7

(a)  

12 + _ = 12

(a)  

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

(a)  

Match the following

• 9 + 4 = 4 + 9

• Associative Property

• 5 + 0 = 5

• Commutative Property

• the result of addition

• Identity Property of Addition

• 2 + (6 + 8) =

  (8 + 2) + 6

• sum

• the result of subtraction

• difference

16 + (8 + 4) =

(a)  

57 + 0 =

(a)  

(62 + 35) + 8 =

(a)  

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

(a)  

Can the commutative property be used with subtraction?

• yes

• no

Reorder the following, greatest to least

• 734

• 7340

• 7034

• 743

• 7304