Addition and Subtraction to 20 Fluency

Front

What is the sum of 9 and 9?

Back

18

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2

Front

What is the sum of 5 and 5?

Back

10

Tags

CCSS.2.OA.C.3

Front

What is 16 minus 8?

Back

8

Tags

CCSS.2.OA.A.1

Front

What is the sum of 4 and 10?

Back

14

Tags

CCSS.1.OA.A.1

Front

What is the sum of 5 and 2?

Back

7

Tags

CCSS.2.OA.C.3

Front

What is the definition of addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total.

Tags

CCSS.1.OA.A.1

Front

What is the definition of subtraction?

Back

Subtraction is the mathematical operation of taking one number away from another.

Front

What is the commutative property of addition?

Back

The commutative property of addition states that changing the order of the addends does not change the sum.

Tags

CCSS.1.OA.B.3

Front

What is the associative property of addition?

Back

The associative property of addition states that the way in which numbers are grouped does not change their sum.

Tags

CCSS.1.OA.B.3

Front

What is a number line and how is it used in addition and subtraction?

Back

A number line is a visual representation of numbers on a straight line, used to illustrate addition and subtraction by moving right for addition and left for subtraction.

Tags

CCSS.5.NBT.B.7