Have you ever used money?
If yes, then you’ve already used decimals!
What is a Decimal?
A decimal is a number that has a dot (.) in it.
That dot is called the decimal point.
Example:
₹2.50 (This means 2 rupees and 50 paise)
3.75 (This means 3 and 75 hundredths)
So, decimals are just numbers that include parts of a whole.
They help us with things like:
Money 😊
Measurements 😊
Weight 😊
Time 😊
Understanding Place Value in Decimals
Let’s break down this decimal number:
23.47
Place Tens Ones .
Tenths Hundredths
Value 23.47
The whole number part is before the dot: 23
The decimal part is after the dot: .47
4 is in the tenths place
7 is in the hundredths place
Think of it like cutting a pizza into 10 or 100 slices!
Adding Decimals
How to Add Decimals – Step by Step
Step 1: Line up the decimal points!
Always line up the decimal points vertically (one under the other).
Step 2: Add as you do in whole numbers.
Start from the right and move to the left.
Step 3: Put the decimal point in the answer.
We added a zero to make both numbers have two decimal places.
That makes it easier!
Subtraction of Decimals
Now let’s learn subtraction!
How to Subtract Decimals – Step by Step
Step 1: Line up the decimal points.
Just like addition!
Step 2: Add zeroes if needed.
Make sure both numbers have the same number of digits after the decimal.
Step 3: Subtract like whole numbers.
Start from the right, borrow if needed.
Step 4: Place the decimal point.
It goes right in the same place.
Real-Life Uses of Decimal Addition & Subtraction
Here’s how you use these skills every day:
Situation What You Do
Shopping Add up item prices
Cooking Measure ingredients like
