How to Divide by 1

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  • 00:00 Division
  • 00:37 Dividing by 1
  • 1:28 The Rule
  • 2:08 Examples
  • 2:50 Lesson Summary
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Lesson Transcript
Instructor: Jennifer Reed
Watch this video lesson to learn how you can divide any number by 1. Learn the rule that will allow you to solve any division by 1 problem in an instant.


In this lesson, we will be talking about division. To perform division means to separate into parts. The number that you are dividing tells you how many parts to split your other number by. So, 4 / 2 means you are separating the 4 into 2 parts.

Learning about division is important because division is one of the main operations that are the basis for all math. Being able to perform your division problems easily and quickly will help you tremendously on your math tests and when solving problems.

In this lesson, we will focus on division by 1. Let's see what happens when we divide by 1.

Dividing by 1

Let's say that we are given the problem 5 / 1. We need to divide 5 by 1. Let's think about what this means. We know that division means to separate into parts. So, how many parts do we need to separate our 5 into? That's easy, right? One part.

We can visualize this by picturing each part as a bowl. How many bowls do we have to split our 5 into? If you answered 1 bowl, you are correct. If we have just 1 bowl, how much of the 5 do you think will go in there? All of it? Yes! All of it! If all of it goes in there, what do you think the answer is? Is it 5? That's right. 5 / 1 = 5.

What about 17 / 1? What do you think this equals? Here again, we are separating the 17 into just 1 bowl. So, how much of the 17 do you think will go into this 1 bowl? Did you say 17? That's exactly right. So 17 / 1 = 17.

The Rule

Do you notice something interesting here? It appears that when we are dividing by 1, it equals the number we are dividing. From this, we can create this rule:

Any number divided by 1 equals itself.

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