## Introduction

When you are adding or subtracting decimals you will often come across problems with decimals that may be missing a digit in various place values. Well, in this lesson, we will learn how we can insert zeros in the empty spaces to make the addition or subtraction easier for us!

## Inserting Zeros for Addition

Let's say that we have a problem such as 24.5+3.2.

Remember that when you are adding or subtracting decimals, the decimal point needs to line up one on top of the other:

24.5

__+3.2__

Now, as you can see, there is no digit in the tens place for the decimal number 3.2.

This is when you can insert a zero in the place where there are no digits.

*Why add a zero?*

*Because zero holds no value so it won't change our problem!*

24.5

__+03.2__

27.7

That means that the sum of 24.5+3.2 equals 27.7!

## Inserting Zeros for Subtraction

Let's say that we have the problem 18.79-12.3.

Now as you can see, there is no digit for the hundredths place in the decimal number 12.3.

This is when we insert a zero in the place where there are no digits.

18.79

-12.30

---------

06.49

## No comments:

## Post a Comment