Missing Numbers Addition and Subtraction

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 does 'missing number' mean in math problems?

Back

A missing number is a number that is not given in a math problem, and you need to find it.

Front

If you have 10 apples and you eat 3, how many apples do you have left?

Back

7 apples.

Front

What is the equation for finding a missing number in addition?

Back

If you know the total and one part, the equation is: Total - Part = Missing Number.

Front

What is the equation for finding a missing number in subtraction?

Back

If you know the result and one part, the equation is: Result + Part = Original Number.

Front

How do you represent 'some went away' in a number sentence?

Back

You can use a question mark or a variable, like: Original Number - ? = Remaining Number.

Front

If there are 80 tigers and 31 are left, how many went away?

Back

49 tigers went away.

Front

What is a word problem?

Back

A word problem is a math problem written in words that describes a real-life situation.

Front

How do you solve a word problem?

Back

Read the problem carefully, identify the numbers, and decide whether to add or subtract.