P4 Maths: Area Units And Conversion (Paper 1 (basics))

P4 Maths: Area Units and Conversion (Paper 1 (basics))

2026-11-15

Tutor Prep Guide · How square metres and square centimetres relate, which way to multiply or divide when converting area units, keeping side length apart from area, comparing areas given in different units, and diagnosing common slips

P4 Maths: Area Units and Conversion (Paper 1 (basics))

Ten area unit conversion questions on square metres and square centimetres, square kilometres, mixed measurements and comparing areas, with answers and one-line notes.

Level: Primary 4 Maths; format: converting area units, splitting mixed measurements, comparing areas, finding a missing side and diagnosing wrong work.　Primary 4 area unit conversion practice: ten questions on 1 square metre = 10 000 square centimetres, square kilometres, mixed measurements, comparing areas and common slips, each with an answer and a one-line note.

01　Paper details (check answers afterwards)

Item	Detail
Questions	10
Suggested time	20
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: P4 Maths: Area Units and Conversion
Level	P4

02　Questions (10 items)

FoundationHow many square centimetres are there in 1 square metre?
FoundationHow many square centimetres are there in 3 square metres?
FoundationHow many square metres are there in 20 000 square centimetres?
IntermediateHow many square centimetres are there in 2.5 square metres?
IntermediateHow many square metres are there in 45 000 square centimetres?
IntermediateA sheet of paper is 30 cm long and 20 cm wide. What is its area in square centimetres?
ChallengeHow many square centimetres are there in 0.8 square metres?
ChallengeA piece of land is 4 m long and 3 m wide. Give its area in square metres and in square centimetres.
ChallengeA square has sides of 200 cm. What is its area in square metres?
Error redoA student wrote “5 square metres = 500 square centimetres”. Where is the mistake?

03　Answers and one-line notes

#	Answer	One-line note
1	10 000 square centimetres.	One metre is 100 centimetres, and area multiplies the length twice, so 100 x 100 = 10 000.
2	30 000 square centimetres.	Each square metre holds 10 000 square centimetres, so 10 000 x 3 gives 30 000.
3	2 square metres.	Going from square centimetres to square metres, divide by 10 000: 20 000 / 10 000 = 2.
4	25 000 square centimetres.	Multiply 10 000 by 2.5 to get 25 000; a decimal amount works the same way.
5	4.5 square metres.	Divide 45 000 by 10 000 to get 4.5, and a decimal answer is acceptable.
6	600 square centimetres.	Area of a rectangle is length x width, so 30 x 20 = 600, and centimetres give square centimetres.
7	8 000 square centimetres.	Multiply 0.8 by 10 000 to get 8 000; being under one square metre, the answer must be under 10 000.
8	12 square metres, that is 120 000 square centimetres.	Four times three gives 12 square metres, and multiplying by 10 000 gives 120 000 square centimetres.
9	4 square metres.	Change 200 cm to 2 m first, then 2 x 2 = 4; do not square 200 and forget the unit.
10	Only 100 was multiplied; the correct answer is 50 000 square centimetres.	Area conversion multiplies by 100 twice, that is by 10 000, so 5 x 10 000 = 50 000.

04　What to do after marking

After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
Repeat the same item two days later; move to the next paper only when both attempts are correct.
Parents only need the answer and note columns; there is no need to explain every item.

Ask first whether the figure is a length or an area. Lengths convert by 100, while areas convert by 100 twice, that is 10 000. When one side is in metres and the other in centimetres, match the units before multiplying, convert both sides to the same unit before comparing, and always finish by checking the square unit in the answer.Tutor Registration →

Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.