Introduction

In the previous class, we learned about simple addition. But today, we'll explore a new, exciting twist: "The Addition of Decimals!" Adding decimals is a lot like doing regular addition with whole numbers, but there are a few special rules we need to follow.

The most important superhero secret to remember is this: if you keep your maths work neat and tidy, adding decimal numbers will be a breeze! In this journey, we'll explore how to add decimals, combine decimals with whole numbers, and much more - all in a super fun way!

So, grab your cape and let's dive into the world of decimal addition!

What is Decimals

Decimals are the numbers with a little dot (.) in the middle, called a decimal point. These special numbers help us mix whole numbers and fractions all together! It's important to understand the "place value" of numbers when working with decimals.

Decimals and fractions are like best friends, and we can change a decimal into a fraction by putting the number without the decimal point and dividing it by the place value of its last digit.

In the fantastic world of decimals, whole numbers have their usual place values, like ones, tens, and hundreds. But once you pass the decimal point, you enter a new world of numbers! Here, each place is ten times smaller as you move to the right.

After the one's place, we have tenths (1/10) on the right. Next to tenths are hundredths (1/100), and it keeps going like this! So, in decimals, it's like an amazing system of numbers getting smaller, like steps on a secret staircase to a world of tiny, sparkling numbers.

How to Add Decimals

How to Add Decimals? Adding decimals is a lot like adding whole numbers, just with an extra sparkle of fun! To add decimals the right way, follow these simple steps:

1. Write the numbers in neat columns, like soldiers in a line.
2. Make sure the decimal points are all lined up in a straight row.
3. When you find the sum, put a decimal point directly below the decimal points in the numbers you're adding.

Now, let's use a fun example to strengthen your understanding!

Imagine you have a really cute piggy bank, and you want to add some shiny coins to it. You put in 2.5 dollars worth of coins on Monday and then 1.2 dollars worth on Tuesday. How much money in total did you add to your piggy bank?

To find out, we'll add the decimals:

2.5

+1.2

First, write the numbers in a neat column and line up the decimal points. Now, let's add the numbers, starting in the tenths place:

2.5

+1.2

3.7 (5 + 2 = 7 in the tenths place)

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