Math

Front

What is the sum of 8 and 9?

Back

17

Front

What is the sum of 5 and 6?

Back

11

Front

What is the sum of 5 and 5?

Back

10

Front

What is the sum of 9 and 9?

Back

18

Front

What is the sum of 10 and 8?

Back

18

Front

What is the definition of addition in mathematics?

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 the identity property of addition?

Back

The identity property states that the sum of any number and zero is that number.

Front

How do you add two-digit numbers?

Back

Align the numbers by place value, add the digits in each column starting from the right, and carry over if necessary.