Subtract And Find Missing Numbers free online Math quizzes

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Learning happens to occur in an effective manner only if the concepts studied until far are tested in different ways. This quiz does the same by bringing in some couple of tricky questions. The questions of this quiz expose the child to a real deal on subtracting numbers professionally and the numbers they deal with are no more simple. A typical question involves 335-?=43 and the child has to find out that number

How to subtract and find missing numbers?

Subtraction is a mathematical operation that represents the process of taking away a certain quantity from another. In this lesson, we will learn how to subtract and find missing numbers.

Let’s start with an example. Suppose we are given the equation 10 – ? = 5. We are trying to find the missing number, represented by the question mark (?). To solve this equation, we need to perform the inverse operation of subtraction, which is addition. We can add 5 to both sides of the equation to find the missing number. The equation becomes:

10 – ? + 5 = 5 + 5

Now we can simplify the equation by performing the addition:

10 – ? = 10

Finally, we can subtract 10 from both sides of the equation to find the missing number:

10 – 10 – ? = 10 – 10

This simplifies to:

-? = 0

The missing number is equal to 0. So, the original equation 10 – ? = 5 has the solution ? = 0.

Now let’s try another example. Suppose we are given the equation 15 – ? = 9. To find the missing number, we can add ? to both sides of the equation:

15 – ? + ? = 9 + ?

This simplifies to:

15 – ? = 9 + ?

Now we can subtract 9 from both sides of the equation:

15 – 9 – ? = 9 – 9 + ?

This simplifies to:

6 – ? = ?

Finally, we can subtract ? from both sides of the equation:

6 – ? – ? = ? – ?

This simplifies to:

6 – 2? = 0

To solve for the missing number, we need to divide both sides of the equation by -2:

(6 – 2?)/-2 = 0/-2

This simplifies to:

-3 – ? = 0

Finally, we can add 3 to both sides of the equation to find the missing number:

-3 + 3 – ? = 0 + 3

This simplifies to:

-? = 3

The missing number is equal to 3. So, the original equation 15 – ? = 9 has the solution ? = 3.

Great job! You have now learned how to subtract and find missing numbers. Remember to always perform the inverse operation of subtraction, which is addition, to find the missing number. With practice, you will become an expert at solving equations in no time!