Samacheer Kalvi Class 4 Maths Solutions Term 1 Chapter 4 Measurements Exercise 4.3

Subtract the Following

Question 1. Subtract the following:

Answer:

To subtract 20 meters and 12 centimeters from 93 meters and 25 centimeters, we first subtract the centimeters, then subtract the meters. 25 cm - 12 cm equals 13 cm. Then, 93 m - 20 m equals 73 m. Understanding subtraction of units is key in daily tasks like measuring fabric or calculating travel distances.
In simple words: To subtract measurements, first subtract centimeters, then meters. The answer for 93m 25cm minus 20m 12cm is 73m 13cm.

🎯 Exam Tip: Always align the units (meters and centimeters) correctly before subtracting, and remember to borrow from the meters if the centimeters in the top number are smaller.

Question 2. Subtract the following:

Answer:

We need to subtract 26 meters and 60 centimeters from 38 meters and 90 centimeters. Start by subtracting the centimeters (90 - 60 = 30), then subtract the meters (38 - 26 = 12). This method is like subtracting regular numbers, but you keep track of meters and centimeters separately. The final difference is 12 meters and 30 centimeters.
In simple words: Subtract 26 meters 60 centimeters from 38 meters 90 centimeters. First, subtract the centimeters (90 - 60 = 30). Then, subtract the meters (38 - 26 = 12). The answer is 12 meters 30 centimeters.

🎯 Exam Tip: When subtracting measurement units, always check if the smaller unit (centimeters) in the first number is greater than or equal to the smaller unit in the second number to avoid borrowing errors.

Question 3. Subtract the following:

Answer:

To find the difference between 75 meters 22 centimeters and 56 meters 35 centimeters, we need to subtract. Since 22 cm is less than 35 cm, we borrow 1 meter (100 cm) from the 75 meters, making it 74 meters and 122 centimeters. Then we subtract 35 cm from 122 cm, which gives 87 cm. After that, we subtract 56 meters from the remaining 74 meters, which gives 18 meters. Borrowing from the meter unit is similar to borrowing from the tens place in standard subtraction, but here you borrow 100 units because 1 meter equals 100 centimeters. So, the result is 18 meters and 87 centimeters.
In simple words: Subtract 56m 35cm from 75m 22cm. Since 22cm is smaller than 35cm, take 1 meter (which is 100cm) from 75m, making it 74m and 122cm. Now subtract: 122cm - 35cm = 87cm, and 74m - 56m = 18m. The final answer is 18m 87cm.

🎯 Exam Tip: Remember to 'borrow' 100 cm when you take 1 meter from the meters column during subtraction, as 1 meter equals 100 centimeters.

Question 4. Subtract the following:

Answer:

To subtract 16 meters 94 centimeters from 27 meters 81 centimeters, we first look at the centimeters. Since 81 cm is smaller than 94 cm, we need to borrow 1 meter (which is 100 cm) from the 27 meters. This makes the meters 26, and the centimeters 81 + 100 = 181. Now, we subtract: 181 cm - 94 cm = 87 cm. Then, subtract the meters: 26 meters - 16 meters = 10 meters. This borrowing concept is fundamental in many unit conversions, ensuring that we always have enough units to perform subtraction. The final answer is 10 meters and 87 centimeters.
In simple words: Subtract 16m 94cm from 27m 81cm. Since 81cm is less than 94cm, take 1 meter (100cm) from 27m. This leaves 26m and makes the centimeters 181cm. Now subtract: 181cm - 94cm = 87cm, and 26m - 16m = 10m. The answer is 10m 87cm.

🎯 Exam Tip: When borrowing in measurement subtraction, remember that 1 unit from the larger measurement (like 1 meter) converts to 100 units of the smaller measurement (100 centimeters).

Question 5. Subtract the following:

Answer:

To find the difference, subtract 46 meters 60 centimeters from 95 meters 80 centimeters. First, subtract the centimeters: 80 cm - 60 cm = 20 cm. Next, subtract the meters: 95 meters - 46 meters = 49 meters. This straightforward subtraction demonstrates how easily measurements can be handled when no borrowing is required. Therefore, the result is 49 meters and 20 centimeters.
In simple words: Subtract 46m 60cm from 95m 80cm. Start with centimeters: 80 - 60 = 20cm. Then, meters: 95 - 46 = 49m. The final answer is 49m 20cm.

🎯 Exam Tip: Always perform subtraction on the smaller units (centimeters) first, then the larger units (meters) to ensure correct calculations.

Question 6. Subtract the following:

Answer:

To subtract 37 meters 85 centimeters from 95 meters 42 centimeters, we first handle the centimeters. Since 42 cm is less than 85 cm, we need to borrow 1 meter (which is 100 cm) from the 95 meters. This changes 95 meters to 94 meters, and 42 centimeters becomes 42 + 100 = 142 centimeters. Now, subtract the centimeters: 142 cm - 85 cm = 57 cm. Then, subtract the meters: 94 meters - 37 meters = 57 meters. This type of calculation is very common in construction or tailoring, where precise measurements and conversions are essential. Thus, the final answer is 57 meters and 57 centimeters.
In simple words: Subtract 37m 85cm from 95m 42cm. Because 42cm is less than 85cm, borrow 1 meter (100cm) from 95m. This makes it 94m and 142cm. Now subtract 142cm - 85cm = 57cm, and 94m - 37m = 57m. The answer is 57m 57cm.

🎯 Exam Tip: Always confirm that the borrowed meter is correctly converted to 100 centimeters before adding it to the existing centimeter value.