Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another.

Front

What is a sum?

Back

A sum is the result of adding two or more numbers together.

Front

What is a difference?

Back

A difference is the result of subtracting one number from another.

Front

What does the equal sign (=) mean?

Back

The equal sign means that the values on both sides are the same.

Front

What is a number sentence?

Back

A number sentence is a mathematical statement that shows a relationship between numbers using operations.

Front

What is a three-digit number?

Back

A three-digit number is a number that has three places, such as 100, 245, or 999.

Front

How do you add numbers?

Back

To add numbers, you combine their values to find the total.

Front

How do you subtract numbers?

Back

To subtract numbers, you take away the value of one number from another.

Front

What is mental math?

Back

Mental math is doing calculations in your head without using paper or a calculator.