Samacheer Kalvi Class 4 Maths Solutions Term 3 Chapter 3 Measurements Exercise 3.3

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 3 Chapter 3 Measurements Ex 3.3

I. Add the Following

 

Question 1. Add the following quantities: 25 l 830 ml and 42 l 126 ml.
Answer:

The total quantity after adding 25 l 830 ml and 42 l 126 ml is 67 l 956 ml. Remember, 1000 ml makes 1 litre, so always check if the millilitre sum crosses 999.
In simple words: When you add 25 litres and 830 millilitres to 42 litres and 126 millilitres, you get a total of 67 litres and 956 millilitres.

🎯 Exam Tip: Always add the millilitres first, then the litres. If the millilitre sum is 1000 or more, carry over 1 litre to the litre column.

 

Question 2. Add the following quantities: 13 l 645 ml and 54 l 143 ml.
Answer:

The sum of 13 l 645 ml and 54 l 143 ml is 67 l 788 ml. This is a straightforward addition with no carry-over from millilitres to litres.
In simple words: Adding 13 litres and 645 millilitres to 54 litres and 143 millilitres gives a total of 67 litres and 788 millilitres.

🎯 Exam Tip: When adding, always align the units (litres with litres, millilitres with millilitres) to avoid mistakes.

 

Question 3. Add the following quantities: 13 l 250 ml and 32 l 140 ml.
Answer:

The total capacity when 13 l 250 ml is added to 32 l 140 ml is 45 l 390 ml. This calculation is simple as no borrowing or carrying is needed between units.
In simple words: If you combine 13 litres and 250 millilitres with 32 litres and 140 millilitres, you will have 45 litres and 390 millilitres in total.

🎯 Exam Tip: Double-check your basic addition of numbers to ensure the final result is accurate.

II. Subtract the Following

 

Question 1. Subtract the following quantities: 7 l 300 ml from 15 l 400 ml.
Answer:

After subtracting 7 l 300 ml from 15 l 400 ml, the remaining quantity is 8 l 100 ml. This subtraction works directly without needing to borrow from the litre column.
In simple words: When you take away 7 litres and 300 millilitres from 15 litres and 400 millilitres, you are left with 8 litres and 100 millilitres.

🎯 Exam Tip: When subtracting, ensure the larger quantity is always on top. Subtract millilitres first, then litres.

 

Question 2. Subtract the following quantities: 21 l 500 ml from 29 l 910 ml.
Answer:

Subtracting 21 l 500 ml from 29 l 910 ml leaves 8 l 410 ml. This is a simple subtraction without any need for borrowing.
In simple words: If you remove 21 litres and 500 millilitres from 29 litres and 910 millilitres, 8 litres and 410 millilitres will remain.

🎯 Exam Tip: Always subtract the millilitre quantities first, then the litre quantities, paying close attention to column alignment.

 

Question 3. Subtract the following quantities: 34 l 230 ml from 63 l 560 ml.
Answer:

The difference between 63 l 560 ml and 34 l 230 ml is 29 l 330 ml. This involves subtraction where borrowing from the litre column is not required.
In simple words: When you subtract 34 litres and 230 millilitres from 63 litres and 560 millilitres, the leftover amount is 29 litres and 330 millilitres.

🎯 Exam Tip: Practice mental math for simple subtractions to build speed and accuracy.

III. Solve the Following

 

Question 1. Ramu filled petrol in his two cars. The first car had a capacity of 23 l 500 ml and the second car had a capacity of 15 l 750 ml. Find the total quantity of petrol.
Answer:First car's petrol: \( 23 \, l \, 500 \, ml \)
Second car's petrol: \( 15 \, l \, 750 \, ml \)

Total quantity of petrol \( = 39 \, l \, 250 \, ml \). We add the millilitres first, \( 500 + 750 = 1250 \, ml \). Since \( 1000 \, ml = 1 \, l \), we have \( 1 \, l \, 250 \, ml \). The \( 1 \, l \) is carried over to the litre column, so \( 23 + 15 + 1 = 39 \, l \).
In simple words: To find the total petrol, you add the amounts from both cars. First, add the millilitres, then add the litres, remembering to carry over if the millilitres total more than 1000.

🎯 Exam Tip: Always convert millilitres to litres when the total millilitres are 1000 or more before summing up the litres.

 

Question 2. Kannan has some cows. They give milk in the first week 48 l 480 ml and in the second week 57 l 530 ml. Find the total capacity of milk.
Answer:Milk in the first week: \( 48 \, l \, 480 \, ml \)
Milk in the second week: \( 57 \, l \, 530 \, ml \)

Total capacity of milk \( = 106 \, l \, 10 \, ml \). When adding \( 480 \, ml \) and \( 530 \, ml \), we get \( 1010 \, ml \). This is \( 1 \, l \) and \( 10 \, ml \). The \( 1 \, l \) is carried over, making the total litres \( 48 + 57 + 1 = 106 \, l \).
In simple words: To find the total milk, add the milk from the first week and the second week. If the millilitres go over 1000, convert 1000 millilitres into 1 litre and add it to the litres column.

🎯 Exam Tip: Remember to write 10 ml as 010 in the millilitre column if it's the only remaining part after a carry-over, to maintain the three-digit format commonly used in ml. (Although 10 ml is perfectly fine, sometimes 010 is preferred for visual alignment).

 

Question 3. The fruit juice used in a function are given below.

(i) Apple juice + Lemon juice =
(ii) Mango juice + Grapes juice =
(iii) Lemon juice + Mango juice =
Answer:
(i) Apple juice + Lemon juice = Apple juice: \( 16 \, l \, 500 \, ml \)
Lemon juice: \( 20 \, l \, 350 \, ml \)Total \( = 36 \, l \, 850 \, ml \).
(ii) Mango juice + Grapes juice = Mango juice: \( 23 \, l \, 160 \, ml \)
Grapes juice: \( 19 \, l \, 650 \, ml \)Total \( = 42 \, l \, 810 \, ml \).
(iii) Lemon juice + Mango juice = Lemon juice: \( 20 \, l \, 350 \, ml \)
Mango juice: \( 23 \, l \, 160 \, ml \)Total \( = 43 \, l \, 510 \, ml \).
In simple words: For each pair of juices, add their millilitre amounts first. If the sum is 1000 ml or more, convert 1000 ml into 1 litre and carry it over to the litre column before adding the litres.

🎯 Exam Tip: Pay close attention to the carry-overs in addition problems, especially when converting millilitres to litres.

 

Question 4. The shopkeeper had 43 l 750 ml of groundnut oil. He sold 24 l 350 ml. How much oil was left with him?
Answer:Shopkeeper had: \( 43 \, l \, 750 \, ml \)
Sold: \( 24 \, l \, 350 \, ml \)

Oil left \( = 19 \, l \, 400 \, ml \). This is a direct subtraction where the millilitre quantity can be subtracted without borrowing from the litre column.
In simple words: To find out how much oil is left, you subtract the amount sold from the amount the shopkeeper had. Subtract millilitres first, then litres.

🎯 Exam Tip: In subtraction problems, always check if you need to "borrow" 1 litre (1000 ml) from the litre column if the millilitre part being subtracted is larger than the millilitre part it's being subtracted from.

 

Question 5. A bucket contains 15 l 500 ml of water. Gopi poured out 5 l 200 ml to water the plants. How much water is left in the bucket?
Answer:Water in the bucket: \( 15 \, l \, 500 \, ml \)
Water poured out: \( 5 \, l \, 200 \, ml \)

Water left \( = 10 \, l \, 300 \, ml \). This is a simple subtraction of both litres and millilitres without any borrowing involved.
In simple words: To find the water left, subtract the water Gopi used from the total water in the bucket. The answer will be 10 litres and 300 millilitres.

🎯 Exam Tip: In real-world problems involving liquid measurements, always ensure units are consistent (e.g., all in litres and millilitres) before performing calculations.

 

Question 6. I purchased 73 l of milk. My sister has taken 34 l 500 ml of milk. So how much milk is left for me?
Answer:Milk purchased: \( 73 \, l \)
Milk taken by sister: \( 34 \, l \, 500 \, ml \)

Milk left \( = 38 \, l \, 500 \, ml \). Since we cannot subtract 500 ml from 0 ml, we borrow 1 litre (which is 1000 ml) from 73 litres, leaving 72 litres. Then \( 1000 \, ml - 500 \, ml = 500 \, ml \), and \( 72 \, l - 34 \, l = 38 \, l \).
In simple words: To find the remaining milk, you subtract the milk taken from the milk you bought. Since you can't subtract millilitres from zero, you "borrow" 1 litre and turn it into 1000 millilitres to help with the subtraction.

🎯 Exam Tip: When borrowing 1 litre, remember to convert it to 1000 millilitres in the millilitre column and reduce the litre count by 1.

 

Question 7. Find the difference between these two cans: 30 l 500 ml and 22 l 300 ml.
Answer:First can capacity: \( 30 \, l \, 500 \, ml \)
Second can capacity: \( 22 \, l \, 300 \, ml \)

Difference \( = 8 \, l \, 200 \, ml \). To find the difference, we subtract the smaller quantity from the larger quantity. Both millilitre and litre parts can be subtracted directly.
In simple words: To find how much more liquid one can holds than the other, subtract the smaller amount from the larger amount. The difference is 8 litres and 200 millilitres.

🎯 Exam Tip: Always identify the larger quantity first when calculating the difference to ensure you subtract in the correct order.