# Subtraction By 10

## Overview

Previously, you have learned how to **subtract by 1, 2, and 5. **Today, we are going to learn and work with problems dealing with **subtracting by 10**!

Let’s dive right in and take a look at an actual practice problem.

There are **13** fish, but **10** fish are crossed out.

We can SUBTRACT to find out how many ARE LEFT.

This will give us the DIFFERENCE.

When we SUBTRACT **13** minus **10**, we have **3** LEFT.

We say: THIRTEEN minus TEN equals THREE.

We write it like this:

13 – 10 = 3

**Let’s look at another problem!**

In this example, there are **17** trains, but **10** trains are crossed out.

We can SUBTRACT to find out how many ARE LEFT.

This will give us the DIFFERENCE.

When we SUBTRACT **17** minus **10**, we have **7** LEFT.

We say: SEVENTEEN minus TEN equals SEVEN.

We write it like this:

17 – 10 = 7

**Awesome! We will try another problem with pictures now.**

Let’s subtract the diamonds.

We are SUBTRACTING to find out how many are left.

We can see that there were sixteen diamonds to start with. Ten of the diamonds are now gone.

When we SUBTRACT **16** minus **10**, we have **6** left.

We say: SIXTEEN minus TEN equals SIX.

We write it like this:

16 – 10 = 6

Ready to try another one?

We are subtracting the number **10** from the number **19**.

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

19 – 10 = 9.

When the SUBTRAHEND **10** is subtracted from the MINUEND **19**, we get a DIFFERENCE of **9**.

DIFFERENCE is used to describe the amount that is left.

When we want to find what TEN LESS is in a group of objects, we can remember that the DIFFERENCE will be the number that comes TEN BEFORE it when we are counting.

12 – 10 =

For example, **12 – 10 = 2**. We also know that when we count, ten numbers that come before **12** is the number **2**. This can help us to subtract quickly and correctly when subtracting **10** from a group.

Here is another example.

13 – 10 =

For example, **13 – 10 = 3**. We also know that when we count, the number that comes ten before **13** is the number **3**. This can help us to subtract quickly and correctly when subtracting **10** from a group.

There are many different words that are used to describe subtraction. Take a look at the image below that shows you important words you should be familiar with.

Knowing these keywords will help you understand that in order to solve some problems, you must subtract.

**Let’s try a word problem. **

In the problem, we start with **19** strawberries. The key words ARE LEFT tell us to subtract.

TEN strawberries are eaten from the group. We can subtract to find the DIFFERENCE.

19 – 10 = 9 strawberries

**Let’s get our game face on and tackle these next 5 practice questions that you should try on your own!**

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