Mathematics · Class 3
Long and Short
Learn Long and Short with notes, examples, and practice questions.
3 sections15–25 min read3 MCQs · 1 examples
Chapter Overview
100 centimetres make 1 metre; 1000 metres make 1 kilometre.
Long and Short introduces standard length units. Children select centimetres, metres, or kilometres, measure accurately with a ruler, and solve simple length addition and subtraction problems.
Choosing a Unit
- Use centimetres for small objects such as an eraser.
- Use metres for room-sized lengths.
- Use kilometres for long distances between places.
Measuring Accurately
- Place the object's end at the ruler's zero mark.
- Read the mark at the other end without tilting the ruler.
- Use the same unit before adding or comparing lengths.
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Find Remaining Ribbon
A ribbon is 85 cm long. A 27 cm piece is cut off. How much remains?
- 1Both measurements are in centimetres.
- 2Subtract 27 from 85.
- 385 − 27 = 58.
Answer
58 cm
Key Points to Remember
- ✓ Standard units make measurements comparable
- ✓ Choose a unit suited to the distance
- ✓ Begin measuring at zero
Exam Tips
- • Write the unit with every answer
- • Convert to one unit before calculating
Practice MCQs — Long and Short
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 3Score: 0/0
Which unit best measures a pencil?