Samacheer Kalvi Class 4 Maths Solutions Term 2 Chapter 4 Measurements Exercise 4.1

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 2 Chapter 4 Measurements Ex 4.1

1. Add

 

Question 1. Add the following weights: 3 kg 215 g and 4 kg 163 g.
Answer: To add the weights, we add the kilograms and grams separately.

The total weight is 7 kg 378 g.
In simple words: We add the numbers in the 'kg' column and the numbers in the 'g' column separately. Then we combine both answers.

🎯 Exam Tip: Always align the units (kilograms and grams) correctly in columns before adding to avoid mistakes.

 

Question 2. Add the following weights: 6 kg 525 g and 2 kg 363 g.
Answer: We add kilograms and grams separately to find the total weight.

The total weight is 8 kg 888 g.
In simple words: Add the kilograms first, then add the grams. Put both results together for the final answer.

🎯 Exam Tip: Remember that 1 kg equals 1000 g. If the grams add up to 1000 or more, carry over to the kilograms column.

 

Question 3. Add the following weights: 7 kg 255 g and 2 kg 163 g.
Answer: When adding weights, we first add grams. If the sum of grams is 1000 or more, we regroup it into kilograms.

First, add grams: \( 255 + 163 = 418 \) g. Then, add kilograms: \( 7 + 2 = 9 \) kg. The total weight is 9 kg 418 g.
In simple words: Add grams first. If the total grams are less than 1000, keep them as they are. Then, add the kilograms.

🎯 Exam Tip: Always start adding from the smallest unit (grams) and carry over any hundreds or thousands to the next larger unit (kilograms).

2. Subtract

 

Question 1. Subtract the following weights: 43 kg 650 g minus 11 kg 340 g.
Answer: To subtract weights, we subtract grams from grams and kilograms from kilograms.

The difference in weight is 32 kg 310 g.
In simple words: Subtract the grams part, then subtract the kilograms part. Put the answers together.

🎯 Exam Tip: When subtracting, ensure the larger quantity is always on top. Align the units carefully to prevent calculation errors.

 

Question 2. Subtract the following weights: 26 kg 754 g minus 20 kg 330 g.
Answer: We subtract grams from grams and kilograms from kilograms.

The difference in weight is 6 kg 424 g.
In simple words: First, subtract the grams. Then, subtract the kilograms. The final answer will be the remaining kilograms and grams.

🎯 Exam Tip: Always subtract starting from the rightmost column (grams) and move to the left (kilograms).

 

Question 3. Subtract the following weights: 54 kg 115 g minus 36 kg 000 g.
Answer: When the grams in the top number are smaller than in the bottom number, we borrow 1 kg from the kilograms column, which converts to 1000 g.

Subtract grams: \( 115 - 0 = 115 \) g. Subtract kilograms: \( 54 - 36 = 18 \) kg. The difference in weight is 18 kg 115 g.
In simple words: Subtract the grams first. If you need more grams, take 1 kg from the kilogram column and add 1000 g to the grams column. Then subtract the kilograms.

🎯 Exam Tip: When borrowing from the kilogram column, remember to decrease the kilogram value by 1 and increase the gram value by 1000.

 

Question 3. Raman bought 3 kg 250 g of tomatoes, 5 kg 110 g of potatoes and 3 kg 750 g of onions. What is the total weight of the vegetables ?
Answer: To find the total weight, we need to add the weights of all the vegetables Raman bought. Weight of Tomatoes = 3 kg 250 g Weight of Potatoes = 5 kg 110 g Weight of Onions = 3 kg 750 g Total weight of vegetables = 3 kg 250 g + 5 kg 110 g + 3 kg 750 g

First, we add the grams: \( 250 + 110 + 750 = 1110 \) g. Since 1110 g is equal to 1 kg 110 g, we write down 110 g and carry over 1 kg to the kilograms column. Next, we add the kilograms, including the carried-over 1 kg: \( 3 + 5 + 3 + 1 = 12 \) kg. So, the total weight of the vegetables is 12 kg 110 g.
In simple words: Add all the gram amounts together. If the sum is more than 1000g, turn 1000g into 1kg and add it to the kilogram total. Then add all the kilogram amounts.

🎯 Exam Tip: Always list out the given quantities clearly first. This helps in organizing your calculation, especially when there are multiple items to add.

 

Question 4. Kannan bought some fruits and vegetables whose total weight is 3 kg 480 g. If the weight of fruits is 1 kg 657 g, find weight of the vegetables.
Answer: To find the weight of the vegetables, we need to subtract the weight of the fruits from the total weight. Weight of Fruits and Vegetables = 3 kg 480 g Weight of fruits = 1 kg 657 g Weight of vegetables = Total weight - Weight of fruits

First, subtract grams: We cannot subtract 657 g from 480 g. So, we borrow 1 kg from the kilograms column, which is equal to 1000 g. Now, the grams become \( 1000 + 480 = 1480 \) g. Subtract grams: \( 1480 - 657 = 823 \) g. Next, subtract kilograms: The kilograms column now has \( 3 - 1 = 2 \) kg. Subtract kilograms: \( 2 - 1 = 1 \) kg. Therefore, the weight of vegetables = 1 kg 823 g.
In simple words: To find the weight of the vegetables, subtract the weight of the fruits from the total weight. Remember to borrow 1 kg (which is 1000g) if you cannot subtract the grams directly.

🎯 Exam Tip: When dealing with subtraction and borrowing across units, carefully mark your changes to the numbers (e.g., crossing out 3 kg and writing 2 kg, adding 1000 to grams) to avoid confusion.

 

Question 5. The weight of first bag is 1 kg 200 g more than the weight of the second bag. If the weight of the first bag is 3 kg 500 g. Find the weight of the second bag.
Answer: If the first bag is heavier than the second bag by a certain amount, we need to subtract that amount from the first bag's weight to find the second bag's weight. The weight of first bag = 3 kg 500 g More weight of first bag than second bag = 1 kg 200 g Weight of second bag = Weight of first bag - More weight of first bag

First, subtract grams: \( 500 - 200 = 300 \) g. Next, subtract kilograms: \( 3 - 1 = 2 \) kg. Therefore, the weight of the second bag = 2 kg 300 g.
In simple words: The first bag is heavier, so to find the weight of the lighter (second) bag, we subtract the "extra" weight from the first bag's weight.

🎯 Exam Tip: Read word problems carefully to identify whether you need to add or subtract. "More than" usually implies subtraction when finding a base quantity.