Addition and Subtraction Within 20

Front

What is the result of 14 - 7?

Back

7

Front

What is the result of 10 + 7?

Back

17

Front

What is the result of 17 - 4?

Back

13

Front

What is the result of 18 - 18?

Back

0

Front

What is the result of 11 + 6?

Back

17

Front

What is the definition of addition?

Back

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

Front

What is the definition of subtraction?

Back

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

Front

What is the relationship between addition and subtraction?

Back

Addition and subtraction are inverse operations; adding a number and then subtracting the same number returns the original number.

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 in a straight line, used to illustrate addition and subtraction by moving right for addition and left for subtraction.

Front

What is the commutative property of addition?

Back

The commutative property states that changing the order of the numbers in an addition problem does not change the sum.