Measuring Length in Centimetres
Students measure objects using centimetres and compare lengths using standard units.
What You Need to Know
Students measure objects using centimetres and compare lengths using standard units.
Key Concept Diagram
Using a ruler correctly
Reading centimetre measurements
Comparing lengths in cm
Estimating before measuring
Key Vocabulary
centimetre
a unit of length equal to one hundredth of a metre
ruler
a tool used to measure length
estimate
a careful guess before measuring
compare
to look at two or more things to see how they are alike or different
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
A pencil is 15 cm long and an eraser is 4 cm long. How much longer is the pencil?
Question 2
Which unit do we use to measure short lengths like a book?
Question 3
A book is 22 cm and a box is 30 cm. What is the total length if placed end to end?
Key Concepts Summary
- ●Using a ruler correctly
- ●Reading centimetre measurements
- ●Comparing lengths in cm
- ●Estimating before measuring