See free Year 3 length and perimeter worked examples with clear strategies and answers, aligned to the England primary curriculum.
Try each question first, then compare the strategy and answer. The aim is to understand the method, not just copy the final result.
How to think about it: Underline the unit or property being tested before calculating. Draw or label the shape/measure if useful, then check that the final answer includes the correct unit or geometric fact.
Answer: 100 cm
How to think about it: Underline the unit or property being tested before calculating. Draw or label the shape/measure if useful, then check that the final answer includes the correct unit or geometric fact.
Answer: 1 m
How to think about it: Underline the unit or property being tested before calculating. Draw or label the shape/measure if useful, then check that the final answer includes the correct unit or geometric fact.
Answer: 18 cm
How to think about it: Underline the unit or property being tested before calculating. Draw or label the shape/measure if useful, then check that the final answer includes the correct unit or geometric fact.
Answer: 20 cm