Samacheer Kalvi Class 4 Maths Solutions Term 3 Chapter 5 Money InText Questions

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 3 Chapter 5 InText Questions

 

Denomination (Text Book Page No. 35)

 

Question. Convert rupees to paise:
Answer: To convert rupees to paise, multiply the amount in rupees by 100. For example, Rs 1 is equal to 100 paise. This is because 100 paise make up 1 rupee.
In simple words: Each rupee is worth 100 paise. So, to change rupees to paise, just multiply the rupees by 100.

🎯 Exam Tip: Remember the basic conversion: 1 rupee = 100 paise. This is a fundamental concept for money problems.

 

Question. Represent Rs 565 using different Indian currency notes:
Answer: Rs 565 can be represented as:
\( \text{Rs } 565 = \text{ Rs } 200 + \text{ Rs } 200 + \text{ Rs } 100 + \text{ Rs } 50 + \text{ Rs } 10 + \text{ Rs } 5 \)
This combination shows how different note denominations add up to Rs 565. You can also have other combinations like using more Rs 10 or Rs 5 notes.
In simple words: We can make Rs 565 by using two Rs 200 notes, one Rs 100 note, one Rs 50 note, one Rs 10 note, and one Rs 5 note.

🎯 Exam Tip: When breaking down an amount, always try to use the largest possible denominations first to simplify the process.

 

Question. Calculate the following amounts:
(i) Rs 200 ×
(ii) Rs 100 ×
(iii) Rs 50 ×
(iv) Rs 10 ×
(v) Rs 5 ×
Answer:
(i) \( \text{Rs } 200 \times 2 = \text{ Rs } 400 \)
(ii) \( \text{Rs } 100 \times 1 = \text{ Rs } 100 \)
(iii) \( \text{Rs } 50 \times 1 = \text{ Rs } 50 \)
(iv) \( \text{Rs } 10 \times 1 = \text{ Rs } 10 \)
(v) \( \text{Rs } 5 \times 1 = \text{ Rs } 5 \)
Each line shows a basic multiplication to find the total value for a certain number of notes or coins. This helps in understanding how amounts are calculated.
In simple words: We multiply the value of each note by how many of them there are. For example, two Rs 200 notes make Rs 400.

🎯 Exam Tip: Always pay attention to the number of items (the multiplier) to correctly calculate the total value of different denominations.

 

Try This (Text Book Page No. 36)

 

Question. Show different ways to represent Rs 100 using other notes:
Answer:
\( \text{Rs } 100 = 2 \times \text{ Rs } 50 \text{ notes} \)
\( \text{Rs } 100 = 5 \times \text{ Rs } 20 \text{ notes} \)
\( \text{Rs } 100 = 10 \times \text{ Rs } 10 \text{ notes} \)
You can represent a larger currency note with smaller notes in multiple ways. This helps in understanding the value of money and making change.
In simple words: You can make Rs 100 by using two Rs 50 notes, or five Rs 20 notes, or ten Rs 10 notes.

🎯 Exam Tip: Practice breaking down amounts into various denominations to improve your mental math and money handling skills.

 

Activity (Text Book Page No. 36)

 

Question. Show ways to make Rs 50 using different combinations of notes:
Answer:
\( \text{Rs } 50 = \text{ Rs } 20 + \text{ Rs } 20 + \text{ Rs } 10 \)
\( \text{Rs } 50 = \text{ Rs } 10 + \text{ Rs } 10 + \text{ Rs } 10 + \text{ Rs } 10 + \text{ Rs } 10 \)
These are two common ways to combine smaller notes to form a Rs 50 note. Knowing these combinations is useful for daily transactions.
In simple words: You can make Rs 50 with two Rs 20 notes and one Rs 10 note. Or, you can use five Rs 10 notes to make Rs 50.

🎯 Exam Tip: Always check that the sum of the smaller notes equals the target amount. Multiple correct combinations are often possible.

 

Activity (Text Book Page No. 36)

 

Question. Take a sheet of paper and cut out the model notes (Rs 10, Rs 20, and Rs 100). Affix it below the boxes provided to get the total of Rs 200. One is done for you.
Answer: Here are some combinations to make Rs 200:
\( \text{Rs } 200 = \text{ Rs } 50 + \text{ Rs } 50 + \text{ Rs } 50 + \text{ Rs } 50 \)
\( \text{Rs } 200 = \text{ Rs } 100 + \text{ Rs } 50 + \text{ Rs } 20 + \text{ Rs } 20 + \text{ Rs } 10 \)
This activity helps in practically understanding how different denominations add up to a larger sum. It's a hands-on way to learn about money.
In simple words: We can make Rs 200 by using four Rs 50 notes. Another way is to use one Rs 100 note, one Rs 50 note, two Rs 20 notes, and one Rs 10 note.

🎯 Exam Tip: For practical exercises, try to find a variety of combinations using the given notes to show your understanding.

 

Question. (i) Add the following amounts:
\( \text{Rs } 24.60 \)
\( + \text{ Rs } 23.30 \)
Answer: \( \text{Rs } 24.60 + \text{ Rs } 23.30 = \text{ Rs } 47.90 \)
When adding money, always align the decimal points to correctly add the rupees and paise separately. Adding two amounts gives us their combined value.
In simple words: If you have Rs 24.60 and add Rs 23.30 more, you will have a total of Rs 47.90.

🎯 Exam Tip: Always line up the decimal points when adding or subtracting amounts with rupees and paise to ensure correct calculations.

 

Question. (ii) Add the following amounts:
\( \text{Rs } 44.50 \)
\( + \text{ Rs } 22.20 \)
Answer: \( \text{Rs } 44.50 + \text{ Rs } 22.20 = \text{ Rs } 66.70 \)
Addition of money works just like adding regular decimal numbers, with proper alignment. This sum represents the total of two separate monetary values.
In simple words: Add Rs 44.50 and Rs 22.20 together to get Rs 66.70.

🎯 Exam Tip: Double-check your addition, especially with carrying over, to avoid common calculation errors.

 

Question. (iii) Add the following amounts:
\( \text{Rs } 39.80 \)
\( + \text{ Rs } 64.70 \)
Answer: \( \text{Rs } 39.80 + \text{ Rs } 64.70 = \text{ Rs } 104.50 \)
Even when the sum crosses the 100-rupee mark, the principle of adding paise and rupees remains the same. This shows the total amount when two different sums of money are combined.
In simple words: When you add Rs 39.80 and Rs 64.70, you get a total of Rs 104.50.

🎯 Exam Tip: Be careful with carrying over from the paise column to the rupees column, especially when the paise sum is 100 or more.

 

Question. (iv) Add the following amounts:
\( \text{Rs } 48.35 \)
\( + \text{ Rs } 54.67 \)
Answer: \( \text{Rs } 48.35 + \text{ Rs } 54.67 = \text{ Rs } 103.02 \)
Always start adding from the rightmost digit (paise in this case), carrying over to the left as needed. This calculation shows the total amount from two individual money values.
In simple words: If you add Rs 48.35 and Rs 54.67, the total amount is Rs 103.02.

🎯 Exam Tip: Remember that 100 paise equals 1 rupee. Any amount of paise 100 or more should be converted and carried over to the rupees column.

 

Let Us Try (Add Book Page No. 41)

 

Question. Subtract the following:
(i) \( \text{Rs } 85.45 \)
\( - \text{ Rs } 65.75 \)
Answer: \( \text{Rs } 85.45 - \text{ Rs } 65.75 = \text{ Rs } 19.70 \)
When subtracting money, also align the decimal points. If you need to subtract a larger paise value from a smaller one, borrow from the rupees column, remembering that 1 rupee equals 100 paise.
In simple words: If you start with Rs 85.45 and take away Rs 65.75, you are left with Rs 19.70.

🎯 Exam Tip: Borrowing in money subtraction means borrowing 1 rupee (100 paise) from the rupees column, adding it to the paise column.

 

Question. (ii) Subtract the following amounts:
\( \text{Rs } 94.27 \)
\( - \text{ Rs } 36.18 \)
Answer: \( \text{Rs } 94.27 - \text{ Rs } 36.18 = \text{ Rs } 58.09 \)
Subtraction helps us find the difference between two monetary values. Always ensure accurate borrowing when a digit in the minuend is smaller than the corresponding digit in the subtrahend.
In simple words: If you subtract Rs 36.18 from Rs 94.27, you will have Rs 58.09 left.

🎯 Exam Tip: Practice borrowing across decimal points to avoid errors in subtracting paise and rupees accurately.

 

Question. (iii) Subtract the following amounts:
\( \text{Rs } 58.45 \)
\( - \text{ Rs } 49.15 \)
Answer: \( \text{Rs } 58.45 - \text{ Rs } 49.15 = \text{ Rs } 9.30 \)
This calculation determines how much more money is needed or how much change is left. Careful attention to each column ensures a correct final result.
In simple words: Taking Rs 49.15 away from Rs 58.45 leaves you with Rs 9.30.

🎯 Exam Tip: When the result is a small amount, verify your calculation by adding the result back to the subtracted amount to see if it matches the original total.

 

Question. (iv) Subtract the following amounts:
\( \text{Rs } 74.50 \)
\( - \text{ Rs } 55.50 \)
Answer: \( \text{Rs } 74.50 - \text{ Rs } 55.50 = \text{ Rs } 19.00 \)
Subtracting money is a common everyday skill, like calculating change or figuring out how much you spent. The difference between these two amounts is Rs 19.00.
In simple words: If you have Rs 74.50 and spend Rs 55.50, you will have Rs 19.00 remaining.

🎯 Exam Tip: Always ensure that the decimal points are perfectly aligned to avoid calculation mistakes between rupees and paise.

 

Let Us Try (Add Book Page No. 44)

 

Question. Find the cost per item, if the total cost is given. One is done for you.
Answer:

To find the cost of one item, you divide the total cost by the number of items. This is a basic division problem applied to money.
In simple words: To know how much one thing costs, divide the total money spent by how many things you bought.

🎯 Exam Tip: Remember that "cost per item" or "unit cost" is always found by dividing the total cost by the quantity.

 

Question. Fill in the following table:
Answer:

To find the total cost, you multiply the cost of one item by the number of items purchased. This helps in budgeting and knowing the total expenditure.
In simple words: Multiply the price of one item by how many you buy to get the total cost for those items.

🎯 Exam Tip: Always clearly identify what is being asked (total cost, unit cost, quantity) before starting calculations.

 

Let Us Try (Add Book Page No. 47)

 

Question. Find the estimated total cost:
Answer:

Estimation simplifies amounts to the nearest whole number for easier mental calculation. If the paise amount is 50 or more, we round up to the next rupee; if it's less than 50, we round down.
In simple words: To estimate, we round money to the closest whole rupee. If the paise is 50 or more, we go up. If it's less than 50, we stay at the current rupee.

🎯 Exam Tip: Always state the rounding rule being used (e.g., nearest rupee, nearest ten rupees) if not specified in the question.

 

Question. Estimate the following rupees (before or after) using the multiples of Rs 10.
Answer:

When estimating to the nearest multiple of 10, if the last digit is 5 or more, round up to the next multiple of 10. If it's less than 5, round down. This simplifies numbers for quick calculations.
In simple words: To estimate to the nearest ten rupees, look at the last digit. If it's 5 or more, round up to the next ten. If it's less than 5, round down.

🎯 Exam Tip: Clearly understand the rounding rule (e.g., nearest 10, nearest 100) before estimating, as different rules lead to different answers.

 

Question. Deepak bought groundnut cookies for Rs 24.40, Dhal mixture for Rs 34.60, and murukku for Rs 28.75. He prepared to estimate the value to the nearest rupees. Fill in the table:
Answer:

To estimate to the nearest rupee, amounts with 50 paise or more are rounded up, while those with less than 50 paise are rounded down. This makes mental math simpler for quick budgeting. For example, Rs 24.40 rounds to Rs 24 because 40 paise is less than 50 paise. Rs 34.60 rounds to Rs 35 because 60 paise is more than 50 paise.
In simple words: Deepak estimated each price to the nearest whole rupee. If the paise was 50 or more, he rounded up. If it was less than 50, he rounded down. Then he added the estimated prices.

🎯 Exam Tip: Clearly show the estimated price for each item before calculating the total estimated cost, and remember that 50 paise is the cutoff for rounding up or down to the nearest rupee.