Samacheer Kalvi Class 4 Maths Solutions Term 3 Chapter 5 Money Exercise 5.1

Question 1. In Rs 1000, how many notes of different denominations are there?
(i) How many Rs 500 notes are there?
(ii) How many Rs 200 notes are there?
(iii) How many Rs 100 notes are there?
(iv) How many Rs 50 notes are there?
Answer:
(i) In Rs 1000, there are 2 notes of Rs 500. (Rs 500 \( \times \) 2 = Rs 1000)
(ii) In Rs 1000, there are 5 notes of Rs 200. (Rs 200 \( \times \) 5 = Rs 1000)
(iii) In Rs 1000, there are 10 notes of Rs 100. (Rs 100 \( \times \) 10 = Rs 1000)
(iv) In Rs 1000, there are 20 notes of Rs 50. (Rs 50 \( \times \) 20 = Rs 1000)
In simple words: We find out how many notes of a certain value are needed to make a bigger amount like Rs 1000. This helps us understand how money is broken down into different parts.

🎯 Exam Tip: To find the number of notes, divide the total amount by the value of a single note. For example, Rs 1000 / Rs 500 = 2 notes.

Question 2. Kamala had change of Rs 100, Rs 50, Rs 20 and Rs 10 notes. How many rupees did she have in each to get the total of rupees 500?
Answer: To make a total of Rs 500, Kamala had:
4 notes of Rs 100 (4 \( \times \) Rs 100 = Rs 400)
1 note of Rs 50 (1 \( \times \) Rs 50 = Rs 50)
2 notes of Rs 20 (2 \( \times \) Rs 20 = Rs 40)
1 note of Rs 10 (1 \( \times \) Rs 10 = Rs 10)
Adding these gives: Rs 400 + Rs 50 + Rs 40 + Rs 10 = Rs 500.
In simple words: Kamala used different types of money notes (like Rs 100, Rs 50, Rs 20, and Rs 10) and counted them to reach a total of Rs 500. She had 4 of the Rs 100 notes, 1 of the Rs 50 notes, 2 of the Rs 20 notes, and 1 of the Rs 10 notes.

🎯 Exam Tip: When making a specific total using different denominations, always check your calculation at the end by adding up all the note values to ensure it matches the target amount.

Question 3. Convert the following rupees into paise.
(i) Rs 7.50
(ii) Rs 18.75
(iii) Rs 54.68
(iv) Rs 102.50
(v) Rs 129.45
(vi) Rs 308.61
Answer: To convert rupees into paise, we multiply the amount in rupees by 100, because 1 Rupee = 100 Paise.
(i) Rs 7.50 = 7.50 \( \times \) 100 paise = 750 paise
(ii) Rs 18.75 = 18.75 \( \times \) 100 paise = 1875 paise
(iii) Rs 54.68 = 54.68 \( \times \) 100 paise = 5468 paise
(iv) Rs 102.50 = 102.50 \( \times \) 100 paise = 10250 paise
(v) Rs 129.45 = 129.45 \( \times \) 100 paise = 12945 paise
(vi) Rs 308.61 = 308.61 \( \times \) 100 paise = 30861 paise
In simple words: To change rupees into paise, you just move the decimal point two places to the right. This is because there are 100 paise in one rupee.

🎯 Exam Tip: Remember that Rs X.YY means X rupees and YY paise. When converting to paise, the decimal part becomes the paise directly, and the rupee part is multiplied by 100 then added to the paise part.

Question 4. Write the denomination for the following amount.
(i) Rs 466 = Rs 200, Rs 100, Rs 100, Rs 50, Rs 10, Rs 5, Rs 1
Answer:
(i) The breakdown of Rs 466 into notes is:
Rs 200 \( \times \) 1 = Rs 200
Rs 100 \( \times \) 2 = Rs 200
Rs 50 \( \times \) 1 = Rs 50
Rs 10 \( \times \) 1 = Rs 10
Rs 5 \( \times \) 1 = Rs 5
Rs 1 \( \times \) 1 = Rs 1
Total = Rs 200 + Rs 200 + Rs 50 + Rs 10 + Rs 5 + Rs 1 = Rs 466.
In simple words: To get Rs 466, we use one Rs 200 note, two Rs 100 notes, one Rs 50 note, one Rs 10 note, one Rs 5 coin, and one Rs 1 coin. This shows how to make an exact amount using different kinds of money.

🎯 Exam Tip: Always start with the largest denominations first to simplify the process of breaking down an amount.

Question 4. (ii) Use and fill in the boxes with the amounts given below, to get the given amount (Rs 845).
Rs 845 =
Answer:
(ii) To make Rs 845 using common notes, we can use:
Rs 500 \( \times \) 1 = Rs 500
Rs 200 \( \times \) 1 = Rs 200
Rs 100 \( \times \) 1 = Rs 100
Rs 20 \( \times \) 2 = Rs 40
Rs 5 \( \times \) 1 = Rs 5
Total = Rs 500 + Rs 200 + Rs 100 + Rs 40 + Rs 5 = Rs 845.
In simple words: To make Rs 845, you can use one Rs 500 note, one Rs 200 note, one Rs 100 note, two Rs 20 notes, and one Rs 5 note. This is one way to collect the total amount.

🎯 Exam Tip: There might be several combinations of notes to make a total. A common strategy is to use the largest possible notes first to reduce the number of notes needed.

Question 4. (iii) Find the missing amount based on the given notes.
Answer: The problem shows notes with values and asks for a calculation. If we have Rs 100 and subtract Rs 25, the remaining amount is Rs 75.
Rs 100 - Rs 25 = Rs 75.
In simple words: If you start with Rs 100 and take away Rs 25, you are left with Rs 75.

🎯 Exam Tip: Understand that money calculations are simple arithmetic. Identify if you need to add, subtract, multiply, or divide based on the problem's context.

Question 4. (iv) Find the total amount based on the given notes and operations.
Answer: Based on the provided operations, we first subtract Rs 45 from Rs 75. Then, we add Rs 30 to the result.
Rs 75 - Rs 45 = Rs 30
Rs 30 + Rs 30 = Rs 60
In simple words: First, you take Rs 45 away from Rs 75, which leaves you with Rs 30. Then, you add another Rs 30 to that, making the total Rs 60.

🎯 Exam Tip: Always follow the order of operations carefully in money problems to avoid mistakes in the final calculation.

Question 5. Convert the following paise into rupees.
(i) 800 paise
(ii) 500 paise
(iii) 2075 paise
(iv) 6860 paise
(v) 200 paise
(vi) 150 paise
(vii) 1000 paise
(viii) 2000 paise
Answer: To convert paise into rupees, we divide the amount in paise by 100, because 1 Rupee = 100 Paise.
(i) 800 paise = 800 \( \div \) 100 = Rs 8.00
(ii) 500 paise = 500 \( \div \) 100 = Rs 5.00
(iii) 2075 paise = 2075 \( \div \) 100 = Rs 20.75
(iv) 6860 paise = 6860 \( \div \) 100 = Rs 68.60
(v) 200 paise = 200 \( \div \) 100 = Rs 2.00
(vi) 150 paise = 150 \( \div \) 100 = Rs 1.50
(vii) 1000 paise = 1000 \( \div \) 100 = Rs 10.00
(viii) 2000 paise = 2000 \( \div \) 100 = Rs 20.00
In simple words: To change paise into rupees, you move the decimal point two places to the left. This is the opposite of converting rupees to paise, as 100 paise make up one rupee.

🎯 Exam Tip: When dividing by 100, you are essentially finding how many groups of 100 paise are there, which directly gives you the rupee value. Remember to include the decimal point for amounts with paise remaining.