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3rd-5th Grade Math: Practice & Review37 chapters | 252 lessons

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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.

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.

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.*

This rule tells us simply that if we have a number divided by 1, our answer will equal that number regardless of what that number is.

4 / 1 = 4

126 / 1 = 126

We don't even have to pay that much attention to the number we are dividing. We just have to make sure that when dividing any number by 1, we remember the answer is always itself.

Did that sound a bit confusing? Let's look at a few more examples.

*What is 515 / 1?*

What are we doing here? We are dividing by 1. What is the rule? Anything divided by 1 is itself. So 515 / 1 is 515.

*What is 7,645 / 1?*

We are again dividing by 1. So the answer is the number we are dividing.

7,645 / 1 = 7,645

*What is 42 / 1?*

We are dividing by 1 and because anything divided by 1 is itself, our answer is 42 / 1 = 42.

Let's review what we've learned.

To perform **division** means to separate into parts. So, 4 / 2 means you are separating the 4 into 2 parts. In the case of dividing by one, we learned that any number divided by 1 equals itself. So, if we have 4 / 1, the answer will be 4.

**Division**: Division means to separate into parts.

Subsequent to watching this lesson, you should be able to divide any number by 1.

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3rd-5th Grade Math: Practice & Review37 chapters | 252 lessons

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