Mathematics

Money

Class 4 | CBSE / NCERT / ICSE

🎯 Learning Objectives

Students will understand the relationship between rupees and paise (1 Rs = 100 paise).
Students will write money amounts using decimal notation (e.g., Rs 45.75).
Students will add and subtract money amounts.
Students will make bills and calculate totals and change.

📖 Let Us Begin!

We use money every day -- to buy vegetables at the sabzi mandi, pay the auto fare, or buy books from a shop. In India, our currency is the Indian Rupee (Rs). The smaller unit is the paisa.

1 Rupee = 100 Paise. We write money using a decimal point to separate rupees and paise. For example, forty-five rupees and seventy-five paise is written as Rs 45.75.

Image: Indian currency denominations — ₹1, ₹2, ₹5, ₹10, ₹20, ₹50, ₹100, ₹200, ₹500 notes and coins arranged neatly with labels.
Title: Indian Currency Notes and Coins

Writing Money with Decimals

The number before the decimal point shows rupees. The number after the decimal point shows paise. Always write paise using two digits.

Example

Example 1: Writing Money

Twelve rupees and fifty paise = Rs 12.50

Seven rupees and five paise = Rs 7.05 (not Rs 7.5)

Two hundred rupees = Rs 200.00

Converting: Rs 8.35 = 800 paise + 35 paise = 835 paise. Similarly, 460 paise = Rs 4.60.

Adding and Subtracting Money

Line up the decimal points, then add or subtract as you would with normal numbers.

Example

Example 2: Adding Money

Aarav bought a pencil for Rs 8.50 and an eraser for Rs 5.75. What is the total?

Rs 8.50 + Rs 5.75 = Rs 14.25

Example

Example 3: Subtracting Money (Finding Change)

Meera gave Rs 500 to buy a book costing Rs 185.50. What change did she get?

Rs 500.00 - Rs 185.50 = Rs 314.50

Always write paise as two digits after the decimal. Rs 6.5 should be written as Rs 6.50.

Making a Bill

A bill is a list of items bought with their prices. We add all the amounts to find the total.

Example

Example 4: Priya's Stationery Bill

Item	Quantity	Price Each	Total
Notebook	3	Rs 35.00	Rs 105.00
Pen	2	Rs 12.50	Rs 25.00
Ruler	1	Rs 15.00	Rs 15.00

Grand Total = Rs 105.00 + Rs 25.00 + Rs 15.00 = Rs 145.00

📝 Key Words

Word	Meaning
Rupee (Rs)	The main unit of Indian currency
Paisa (p)	The smaller unit; 100 paise = 1 rupee
Decimal Point	The dot that separates rupees from paise (e.g., Rs 45.75)
Bill	A list showing items, quantities, prices, and total cost
Change	The money returned when you pay more than the cost

⭐ Key Points to Remember

1 Rupee = 100 Paise. Always write paise as two digits after the decimal point.
To add or subtract money, line up the decimal points carefully.
To find change: Change = Amount Given - Cost of Item.
To make a bill: Total for each item = Quantity x Price. Grand Total = Sum of all item totals.
To convert: Rs to paise -- multiply by 100. Paise to Rs -- divide by 100.

Finished learning? Now test what you know!

🎯 Quick Quiz — Test Yourself!

Answer these 8 questions about money. Read each one carefully and pick the best answer!

Score: 0 / 8

1. How many paise make 1 rupee?

1 Rupee = 100 Paise.

2. To find the change, you calculate: Change = Amount Given − ?

Change = Amount Given − Cost of Item.

3. Ravi buys a pen for ₹15 and gives a ₹20 note. How much change does he get?

Change = ₹20 − ₹15 = ₹5.

4. To change ₹5 into paise, you...

To convert rupees to paise, multiply by 100. So ₹5 = 500 paise.

5. How many rupees is 250 paise?

To convert paise to rupees, divide by 100: 250 ÷ 100 = ₹2.50.

6. Meena buys 3 books at ₹20 each. What is the total cost?

Total = Quantity × Price = 3 × ₹20 = ₹60.

7. Sita has ₹50. She spends ₹38. How many rupees are left? (write the number)

₹50 − ₹38 = ₹12.

8. When adding or subtracting money written with decimals, you should...

To add or subtract money, line up the decimal points so rupees and paise match.

✏️ Practice Questions

A. Write in decimal form (Rs and paise)

1. Twenty-three rupees and sixty paise = Rs

2. Nine rupees and five paise = Rs

3. 150 paise = Rs

4. Rs 7.80 = paise

B. Add or Subtract

1. Rs 45.50 + Rs 32.75 = Rs

2. Rs 120.00 + Rs 85.60 = Rs

3. Rs 500.00 - Rs 237.50 = Rs

4. Rs 1000.00 - Rs 648.75 = Rs

C. Make a Bill and Find the Total

Item	Quantity	Price Each
Milk (1 litre)	2	Rs 28.00
Bread	1	Rs 40.00
Eggs (pack of 6)	1	Rs 42.50
Biscuits	3	Rs 15.00
Grand Total =

D. Word Problems

1. Rohan bought a cricket bat for Rs 375.50 and a ball for Rs 85.00. How much did he spend in all?

2. Ananya had Rs 1000. She bought a school bag for Rs 650.75. How much change did she receive?

3. A shopkeeper sold 5 kg of rice at Rs 62.50 per kg. What was the total cost?

E. Multiple Choice Questions

1. How many paise are there in Rs 3.50?

(a) 35(b) 305(c) 350(d) 3500

2. Rs 500.00 - Rs 123.75 = ?

(a) Rs 376.25(b) Rs 377.25(c) Rs 376.75(d) Rs 386.25

🎨 Fun Activity -- My Shopping List

Imagine you have Rs 500. Write a shopping list of 5 items you want to buy. Write the price of each item. Find the total and the change you will receive.

S.No.	Item	Price (Rs)
1
2
3
4
5

Total = Rs ____________ | Change from Rs 500 = Rs ____________

Want to review the lesson again?

🎯 Learning Objectives

Understand the relationship between rupees and paise (1 Rs = 100 paise).
Write money amounts using decimal notation (e.g., Rs 45.75).
Add and subtract money amounts.
Make bills and calculate totals and change.

📖 Introduction

We use money every day — to buy vegetables, pay the auto fare, or buy books. In India, our currency is the Indian Rupee (Rs). The smaller unit is the paisa. 1 Rupee = 100 Paise. We write money using a decimal point: forty-five rupees and seventy-five paise = Rs 45.75.

[Image: Indian Currency Notes and Coins — ₹1, ₹2, ₹5, ₹10, ₹20, ₹50, ₹100, ₹200, ₹500 notes and coins arranged neatly with labels]

Writing Money with Decimals

Ex 1: Twelve rupees and fifty paise = Rs 12.50

Seven rupees and five paise = Rs 7.05 (not Rs 7.5)

Two hundred rupees = Rs 200.00

Converting: Rs 8.35 = 835 paise. 460 paise = Rs 4.60.

Adding and Subtracting Money

Ex 2: Aarav bought a pencil for Rs 8.50 and an eraser for Rs 5.75. Total = Rs 8.50 + Rs 5.75 = Rs 14.25

Ex 3: Meera gave Rs 500 for a book costing Rs 185.50. Change = Rs 500.00 - Rs 185.50 = Rs 314.50

Tip: Always write paise as two digits after the decimal. Rs 6.5 → Rs 6.50.

Making a Bill

Ex 4: Priya's Stationery Bill

Item	Qty	Price Each	Total
Notebook	3	Rs 35.00	Rs 105.00
Pen	2	Rs 12.50	Rs 25.00
Ruler	1	Rs 15.00	Rs 15.00

Grand Total = Rs 105.00 + Rs 25.00 + Rs 15.00 = Rs 145.00

Key Words

Word	Meaning
Rupee (Rs)	The main unit of Indian currency
Paisa (p)	The smaller unit; 100 paise = 1 rupee
Decimal Point	The dot separating rupees from paise
Bill	A list showing items, quantities, prices, and total
Change	Money returned when you pay more than cost

⭐ Key Points to Remember

1 Rupee = 100 Paise. Always write paise as two digits after the decimal point.
To add or subtract money, line up the decimal points carefully.
Change = Amount Given - Cost of Item.
Bill: Total for each item = Quantity x Price. Grand Total = Sum of all item totals.
Rs to paise — multiply by 100. Paise to Rs — divide by 100.

A. Write in decimal form (Rs and paise)

1. Twenty-three rupees and sixty paise = Rs

2. Nine rupees and five paise = Rs

3. 150 paise = Rs

4. Rs 7.80 = paise

B. Add or Subtract

1. Rs 45.50 + Rs 32.75 = Rs

2. Rs 120.00 + Rs 85.60 = Rs

3. Rs 500.00 - Rs 237.50 = Rs

4. Rs 1000.00 - Rs 648.75 = Rs

C. Make a Bill and Find the Total

Item	Qty	Price Each
Milk (1 litre)	2	Rs 28.00
Bread	1	Rs 40.00
Eggs (pack of 6)	1	Rs 42.50
Biscuits	3	Rs 15.00
Grand Total =

D. Word Problems

1. Rohan bought a cricket bat for Rs 375.50 and a ball for Rs 85.00. How much did he spend in all?

2. Ananya had Rs 1000. She bought a school bag for Rs 650.75. How much change did she receive?

3. A shopkeeper sold 5 kg of rice at Rs 62.50 per kg. What was the total cost?

E. Multiple Choice Questions

1. How many paise are there in Rs 3.50?

(a) 35(b) 305(c) 350(d) 3500

2. Rs 500.00 - Rs 123.75 = ?

(a) Rs 376.25(b) Rs 377.25(c) Rs 376.75(d) Rs 386.25

🎨 Fun Activity — My Shopping List

Imagine you have Rs 500. Write a shopping list of 5 items. Find the total and the change.

S.No.	Item	Price (Rs)
1
2
3
4
5

Total = Rs __________ | Change from Rs 500 = Rs __________

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Money

🎯 Learning Objectives

📖 Let Us Begin!

Writing Money with Decimals

Adding and Subtracting Money

Making a Bill

📝 Key Words

🎯 Quick Quiz — Test Yourself!

✏️ Practice Questions

Money

Money (continued)