Math Properties

Front 1

Digit

Back 1

Any symbol used to write numbers. Example: 1, 2, 3, ...

Front 2

Place Value

Back 2

The value of the digits in a number

Front 3

Period

Back 3

Each group of three digits separated by a comma

Front 4

Standard Form

Back 4

The way we usually write out numbers. Example: 1,371

Front 5

Expanded Form

Back 5

Shows the value of each digit.
Example: 1,000 + 300 + 70 + 1

Front 6

Word Form

Back 6

The way you read or say a number.
Example: One thousand, three hundred seventy-one

Front 7

Whole numbers

Back 7

A set of counting numbers and zero.
Example: 0, 1, 2, 3,...

Front 8

Variable

Back 8

Missing addends are variables.
Example:
A + 7 = 13;
13 - 7 = 6
A = 6

Front 9

Identity property of addition

Back 9

When you add 0 to any number, the number does not change.
Example: 10 + 0 = 10

Front 10

Identity property of multiplication

Back 10

When you multiply any number by 1, the number does not change.
Example: 12 X 1 = 12

Front 11

Commutative Property of Addition

Back 11

No matter how you switch the addends, the sum will remain the same.
Example:
2 + 3 = 5
3 + 2 = 5

Front 12

Commutative Property of Multiplication

Back 12

No matter how you switch the factors the product will remain the same.
Example:
4 X 5 = 20
5 X 4 = 20

Front 13

Associative Property of Addition

Back 13

No matter how you group the addends, the sum will remain the same.
Example:
(2 + 3) + 4 = 2 = (3 + 4)
5 + 4 = 2 + 7
9 = 9

Front 14

Associative Property of Multiplication

Back 14

No matter how you group the factors, the product will remain the same.
Example:
(2 X 3) X 4 = 2 X (3 X 4)
6 X 4 = 2 X 12
24 = 24

Front 15

Expression

Back 15

A mathematical statement that may use numbers, variables, or both.
Example:
2y + 5

Front 16

Mode

Back 16

The number or item that appears most often in a set of data.
Example: 1, 2, 3, 3, 3, 4, 5
The mode is: 3

Front 17

Median

Back 17

In a set of data, the median is the number in the middle when the data are organized from least to greatest.
Example: 1, 2, 4, 5, 7.
The median is 4
Example: 1, 2, 4, 5, 7, 8.
The median is 4.5
Add the two middle numbers and divide by 2: (4 + 5 = 9; 9÷2 = 4.5 or 4½

Front 18

Zero Property of Multiplication

Back 18

When a number is multiplied by 0, the product is 0.

Front 19

Distributive Property of Multiplication

Back 19

You can multiply the factor of a number and then add the products.
Example:
7 X 12
= (7 X 10) + (7 X 2)
= 70 + 14
= 84

Front 20

Prime Number

Back 20

A whole number greater than one that has exactly two factors, one and the number itself.
Example:
2 = (1 X 2)
3 = (1 X 3)
5 = (1 X 5)
7 = (1 X 7)
11 = (1 X 11)
13 = (1 X 13)
17 = (1 X 17)
19 = (1 X 19)

Front 21

Composite Number

Back 21

A whole number greater than one that has more than two factors. Example:
4 = (1 X 4) & (2 X 2);
6 = (1 X 6) & (2 X 3);
8 = (1 X 8 & 2 X 4);
9 = (1 X 9) & (3 X 3);
10 = (1 X 10) & (2 X 5)

Front 22

Factors

Back 22

Two or more numbers that are multiplied together to form a product.
Example: The factors of 6 are 1, 2, 3, 6