Chapter: 5th Maths : Term 1 Unit 4 : Measurements
Addition of length
Addition
Example
1. Find the sum of the following.(i) 7 m 25 cm + 15 m 50 cm
Sum = 22 m 75 cm
Step 1: Start from centimeter
\( 25 \text{ cm} + 50 \text{ cm} = 75 \text{ cm} \)
Step 2: Add meters
\( 7 \text{ m} + 15 \text{ m} = 25 \text{ m} \)
(ii) 5 km 700 m + 12 km 450m
Sum = 18 km 150 m
Step 1: Add meters
\( 700 + 450 = 1150 \)
Step 2: Convert meter into kilometer
\( 1150 \div 1000 = 1 \text{ km } 150 \text{ m} \)
Step 3: Add 1 km to the km column
\( 1 \text{ km} + 5 \text{ km} + 12 \text{ km} = 18 \text{ km} \)
\( 1 + 5 + 12 = 18 \)
Example
2. The length of three ropes are 1 m 20 cm, 2 m 15 cm and 1 m 25 cm. What is the total length of three ropes?Solution:
Total length of the ropes = 4 m 60 cm