⭐ COUPON: SALE2020 ⭐ 20% OFF ON ALL WORKBOOKS*3 DAYS FREE SHIPPING ⭐ FREE RETURNS ⭐

Fail to load the data
0

Related Subtraction Facts


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Overview

In this lesson, we are going to learn about related subtraction facts. There are three numbers in a family and they are related in some way.

The best way to understand this is by taking a look at a simple subtraction problem.

5 – 3 = 2

Notice that we have three numbers 5, 3, and 2 and the problem reads 5 – 3 = 2.
What the related subtraction fact tells us is that we can switch the numbers 3 and 2 to also make the equation true.

If we switch the numbers 3 and 2, we get 5 – 2 = 3 which is TRUE. We can apply this to any subtraction problem.

Take a look at the example below.

The subtraction problem shows two circles and one circle is being subtracted.
We can SUBTRACT to find the difference.
We can use the subtraction sentence 3 – 1 = ___ for help.
When we SUBTRACT 3 minus 1, we have 2 left.
We say: THREE minus ONE equals TWO.
We write it like this: 3 – 1 = 2

We can also use these same three numbers in our math fact: 3, 1, and 2 to make a RELATED  FACT.

This time our math fact will read:  3 – 2 = 1  because we subtracted 2 this time to get a difference of 1.

3 – 1 = 2  is related to  3 – 2 = 1

They include the same three numbers.

 

Let’s take a look at another example with numbers.
This time, we are subtracting the number 7 from the number 9.
The first number in the subtraction sentence is called the MINUEND.
The second number in the subtraction sentence is called the SUBTRAHEND.
This problem reads as  9 – 7 = 2.
When the SUBTRAHEND 7 is subtracted from the MINUEND  9, we get a DIFFERENCE of 2.
DIFFERENCE is used to describe the amount that is left.

 

These facts are related:

9 – 7 = 2

9 – 2 = 7

Related subtraction facts use the same three numbers.

Let’s take a look at these facts.

5 – 1 =

5 – 4 =

They are related and have the same minuend. We can find their differences. The differences are also subtrahends too.

5 – 1 = 4  and  5 – 4 = 1

 

Here is another example:

8 – 6 =

8 – 2 =

They are related and have the same minuend. We can find their differences. The differences are also subtrahends too.

8 – 6 = 2  and  8 – 2 = 6

 

Sometimes, you might come across a subtraction fact with a missing minuend. You can use related facts to help you solve. Let’s take a look at this pair of facts:

10 – 4 = __

10 – __ = 4

In the first math fact, our difference is missing. We can subtract 4 from 10 to get an answer of 6.
Our second fact is related. It will have the same three numbers as our first fact.
Therefore, 10 – 6 = 4.

 

Here is another example.

11 – 3 = __

11 – __ = 3

In the first math fact, our difference is missing. We can subtract 3 from 11 to get an answer of 8.
Our second fact is related. It will have the same three numbers as our first fact.
Therefore, 11 – 8 = 3.

 

We can also write related subtraction facts when we are given three numbers. Let’s look at this example:

5     8     3

We know that the sum in each subtraction fact, the first number must be the largest number. Which number is the largest: 5, 8, or 3?

The number 8 is the largest. Therefore, the other two numbers will be our subtrahends and difference.

8 – __ = __

8 – __ = __

Let’s create our related facts using the numbers 5, 8, and 3!

8 – 5 = 3

8 – 3 = 5

 

Let’s look at one more example:

13      7      6

We know that the sum in each subtraction fact, the minuend must be the largest number. Which number is the largest: 13, 7, or 6?

The number 13 is the largest.

13 – __ = __

13 – __ = __

Let’s create our related facts using the numbers 13, 7, and 6!

13 – 6 = 7

13 – 7 = 6

 

 

Practice Question 1

Let’s practice! Write the subtraction sentences and solve the problems below.

 

 

See Related Worksheets:
1st grade
Pugs in Mugs Cuddle with Related Equations
Worksheets
 (0)
Who doesn't love pugs, mugs, and related equations? Students will complete the subtraction facts by adding the...
1st grade
Angling for Related Problems
Worksheets
 (0)
This adorable worksheet makes a pretty scary fish look as sweet as a kitten! It also takes the "bite" out of c...
1st grade
Space Kitties, Stars, and Subtraction
Worksheets
 (0)
This may be the best worksheet in the galaxy. It's definitely a great subtraction review! Students will find t...
1st grade
Tiny Bird's Fun with Fewer Worksheet
Worksheets
 (0)
Students will find this beginner's subtraction worksheet perfect for their developing skills! There are seven ...

Try ArgoPrep for FREE

Learn more Try ArgoPrep for FREE

Share good content with friends and get 15% discount for 12-month subscription

Share in facebook Share in twitter
Count the dots to help find the correct minuend!
TIP

 

Practice Question 2

Let’s try another! Write the subtraction sentences and solve the problems below.

 

 

 

 

Practice Question 3

Take a look at the math sentence below. Write the related subtraction fact. Then solve.

17 – 8 =

 

 

 

Practice Question 4

Let’s try another one. Take a look at the math sentence below. Write the related subtraction fact. Then solve.

13 – 4 =

 

 

 

Practice Question 5

Let’s try one more problem!
Look at the groups below.
How many are there in all?
Write the related subtraction sentences and solve..

 

 

See Related Worksheets:
1st grade
Pugs in Mugs Cuddle with Related Equations
Worksheets
 (0)
Who doesn't love pugs, mugs, and related equations? Students will complete the subtraction facts by adding the...
1st grade
Angling for Related Problems
Worksheets
 (0)
This adorable worksheet makes a pretty scary fish look as sweet as a kitten! It also takes the "bite" out of c...
1st grade
Space Kitties, Stars, and Subtraction
Worksheets
 (0)
This may be the best worksheet in the galaxy. It's definitely a great subtraction review! Students will find t...
1st grade
Tiny Bird's Fun with Fewer Worksheet
Worksheets
 (0)
Students will find this beginner's subtraction worksheet perfect for their developing skills! There are seven ...

Try ArgoPrep for FREE

Learn more Try ArgoPrep for FREE

Share good content with friends and get 15% discount for 12-month subscription

Share in facebook Share in twitter
When you know that subtraction facts are related, you can solve them easily!
TIP:

Now you’re ready to take a quick quiz on subtraction related facts!

See Related Worksheets:
1st grade
Pugs in Mugs Cuddle with Related Equations
Worksheets
 (0)
Who doesn't love pugs, mugs, and related equations? Students will complete the subtraction facts by adding the...
1st grade
Angling for Related Problems
Worksheets
 (0)
This adorable worksheet makes a pretty scary fish look as sweet as a kitten! It also takes the "bite" out of c...
1st grade
Space Kitties, Stars, and Subtraction
Worksheets
 (0)
This may be the best worksheet in the galaxy. It's definitely a great subtraction review! Students will find t...
1st grade
Tiny Bird's Fun with Fewer Worksheet
Worksheets
 (0)
Students will find this beginner's subtraction worksheet perfect for their developing skills! There are seven ...

Try ArgoPrep for FREE

Learn more Try ArgoPrep for FREE

Share good content with friends and get 15% discount for 12-month subscription

Share in facebook Share in twitter
Want to test your level?
Select your grade level and start now