Name _______________________________________ Date _________________________Mrs. Labuski / Mrs. Rooney Period _____ Lesson 1-5 Mental Math (Properties)

Vocabulary Definition Example

CommutativeProperty

AssociativeProperty

DistributiveProperty

Identity Property of Zero

Identity Property of One

Property of Zero

Name _______________________________________ Date _________________________Mrs. Labuski / Mrs. Rooney Period ________ Lesson 1-5 Mental Math (Properties)

Vocabulary Definition Example

CommutativeProperty

(Ordering)

You can add or multiply numbers in

any order

18 + 9 = 9 + 18

15 x 2 = 2 x 15

AssociativeProperty

(Grouping)

When you are only adding or only

multiplying, you can group any of the

numbers together.

(17+2)+9=17+(2+9)

(12x2)x4=12x(2x4)

DistributiveProperty

Multiply each number in the parenthesis by the number on the

outside and then add

6 x (10 + 4)6 x 10 + 6 x 4

60 + 2484

Identity Property of Zero

(addition)

The sum of any number and zero is equal to the number

(addition)

9 + 0 = 9

Identity Property of One

(multiplication)

The product of any number and one is

equal to the number. (multiplication)

5 x 1 = 5

Property of Zero(multiplication)

The product of any number and zero is

zero.7 x 0 = 0