Properties of numbers

Which is the missing number? (2 + 1) + 3 = 2 + (__ + 3)

• 0

• 1

• 2

• 3

Which number shows the Associative Property of Addition?

• 32 + 56 + 10 = 10 + 56 + 32

• (49 + 28) + 5 = 49 + (28 + 5)

• 56 + 890 = 890 + 56

• 82 + 0 = 82

What property of Addition is modeled in this number sentence? 51 + 8 + 0 = 51 + 8

• The Associative Property

• The Identity Property

• The Commutative Property

• There isn't a property modeled.

Barnaby wants to find the sum of 41 + 50 + 150 using the Associative Property of Addition. Which shows a way he could choose?

• 41 + (50 + 150) = 241

• 241 + 0 = 241

• 41 + 50 + 150 = 150 + 50 + 41

• 41 + 50 + 150 = 241

Which number sentence is an example of the Identity Property of Addition?

• 18 + 10 =28

• 18 + 10 + 0 = 28

• 10 + 18 = 18 + 10

• (8 + 10) + 10 = 18 + 10

Which is NOT Commutative Property?

• 50 + 40 = 40 + 50

• 53 + 37 = 37 + 53

• 25 + (20 + 10) = (25 + 20) + 10

• 39 + 10 = 10 + 39

Use the Associative Property of Addition to find the sum in 2 + (6 + 4) = ( 2+ 6) + 4

• 14

• 13

• 12

• 11

Use the Identity Property to solve;57 + 0 =

• 54

• 55

• 56

• 57

What does commute mean?

• odd numbers

• even numbers

• move from place to place

• group differently

Type a number that would make this statement true if placed in both blanks: Multiplying any number by ___ equals ___.