Sumas hasta 20

Front

What is the sum of 1 and 7?

Back

8

Front

What is the sum of 5 and 6?

Back

11

Front

What is the sum of 3 and 9?

Back

12

Front

What is the sum of 4 and 7?

Back

11

Front

What is the sum of 6 and 9?

Back

15

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 in a straight line, used to help understand addition by showing the distance between numbers.

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.