Middle Addition to 20

Front

What is the sum of 8 and 4?

Back

12

Front

What is 6 plus 9?

Back

15

Front

Calculate 10 plus 5.

Back

15

Front

What is the result of 2 plus 6?

Back

8

Front

What do you get when you add 9 and 2?

Back

11

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 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.

Front

What is the associative property of addition?

Back

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

Front

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

Back

A number line is a visual representation of numbers on a straight line, used to illustrate addition by moving to the right for positive sums.

Front

What is a fact family in addition?

Back

A fact family is a group of related addition and subtraction facts that use the same numbers.