Find the Missing Number

Front

What is a missing number?

Back

A missing number is a number that is not shown in a sequence or equation, and needs to be found to complete it.

Front

How do you find a missing number in a simple addition problem?

Back

To find a missing number in an addition problem, subtract the known number from the total. For example, if 3 + ? = 5, then ? = 5 - 3, so ? = 2.

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another. It helps to find the difference between numbers.

Front

If 7 - ? = 4, what is the missing number?

Back

The missing number is 3, because 7 - 3 = 4.

Front

What is an equation?

Back

An equation is a mathematical statement that shows that two expressions are equal, often using an equals sign (=).

Front

How can you check if your answer is correct?

Back

You can check your answer by substituting the missing number back into the equation to see if both sides are equal.

Front

What does 'find the missing number' mean in a sequence?

Back

It means to identify the number that is not present in a series of numbers that follow a specific pattern.

Front

If the sequence is 2, 4, ?, 8, what is the missing number?

Back

The missing number is 6, as the pattern increases by 2.

Front

What is a pattern in numbers?

Back

A pattern in numbers is a sequence that follows a specific rule or formula.

Front

How do you find a missing number in a subtraction problem?

Back

To find a missing number in a subtraction problem, you can add the known number to the result. For example, if ? - 2 = 5, then ? = 5 + 2, so ? = 7.