Round money amounts
Key Notes :
Understanding Rounding
- Rounding means adjusting a number to make it simpler while keeping its value close to the original.
- It helps in estimating costs, making quick calculations, and budgeting money.
Rounding Rules
- Look at the digit to the right of the place value you are rounding to.
- If the digit is 5 or more, round up.
- If the digit is 4 or less, round down.
Rounding to the Nearest Dollar
- If cents are 50 or more, round up to the next dollar.
- If cents are 49 or less, round down to the current dollar.
- Example: $5.78 rounds to $6; $12.42 rounds to $12.
Rounding to the Nearest Ten Dollars
- Look at the ones place digit.
- If it’s 5 or more, round up.
- If it’s 4 or less, round down.
- Example: $24.60 rounds to $20; $57.30 rounds to $60.
Rounding to the Nearest Hundred Dollars
- Look at the tens place digit.
- If it’s 50 or more, round up.
- If it’s 49 or less, round down.
- Example: $143 rounds to $100; $275 rounds to $300.
Importance of Rounding Money
- Helps estimate totals while shopping.
- Makes it easier to calculate budgets.
- Useful when dividing money evenly.
Learn with an example
➡️ What is ₹786 rounded to the nearest 100 rupees?
- ₹700
- ₹800
- ₹780
- ₹790
First, find the digit in the hundreds place. This is the place you want to round:
₹786
Now look one place to the right:
₹786
8 is greater than 5, so you will round up. First, replace all the digits to the right of the hundreds place by zeroes:
₹786 → ₹700
Now add 1 to the other part of the number:
₹700 → ₹800
➡️ What is ₹287 rounded to the nearest 100 rupees?
- ₹300
- ₹700
- ₹280
- ₹200
First, find the digit in the hundreds place. This is the place you want to round:
₹287
Now look one place to the right:
₹287
8 is greater than 5, so you will round up. First, replace all the digits to the right of the hundreds place by zeroes:
₹287 → ₹200
Now add 1 to the other part of the number:
₹200 → ₹300
➡️ What is ₹427 rounded to the nearest 100 rupees?
- ₹300
- ₹400
- ₹500
- ₹420
First, find the digit in the hundreds place. This is the place you want to round:
₹427
Now look one place to the right:
₹427
2 is less than 5, so you will round down. Replace all the digits to the right of the hundreds place by zeroes:
₹427 → ₹400
let’s practice!