How is the area of a composite shape found?

Split it into rectangles, find each area and add them, or subtract the missing part from the large rectangle.

Which unit is used for large areas?

Square metres for floors, walls and rooms; square centimetres for small objects such as stamps.

Does unit conversion matter for area?

Yes. 1 metre is 100 centimetres, so 1 square metre is 10000 square centimetres.

P3 Maths Introduction to Area Paper 2: Intermediate

2026-11-09

Tutor Prep Guide · P3 Maths

Ten original items, each with an answer and a one-line explanation.

Direct answers　Items 1-3 are basic, 4-6 intermediate and 7-9 challenge, with item 10 as the error review. Time yourself first, then check each answer and redo what is wrong.

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: P3 Maths: Introduction to Area
Level	P3

02　Questions (10 items)

FoundationA postage stamp has an area of about 4 of which unit?
FoundationWhich unit is suitable for the floor area of a classroom?
FoundationWhat is the area of a rectangle 6 centimetres by 2 centimetres?
IntermediateTwo rectangles have areas of 12 and 10 square centimetres. What is the total area when joined?
IntermediateA rectangle has an area of 36 square centimetres and a width of 4 centimetres. What is its length?
IntermediateA 3 by 4 centimetre rectangle is cut from an 8 by 5 centimetre rectangle. What area remains?
ChallengeAn L shape is a 10 by 8 centimetre rectangle with a 4 by 5 centimetre part removed. What is its area?
ChallengeA room is 250 centimetres by 200 centimetres and each tile is 25 square centimetres. How many tiles are needed?
ChallengeA square of side 8 centimetres is folded into two equal rectangles. What is the area of each?
Error redoA square has a perimeter of 20 centimetres, and a student took 20 as the area. What is the correct area?

03　Answers and one-line notes

#	Answer	One-line note
1	4 square centimetres	A stamp is small, so square centimetres are used, and 4 square centimetres fits a stamp.
2	Square metres	A classroom is large, so square metres are used; square centimetres suit small objects only.
3	12 square centimetres	Six times two = 12 square centimetres.
4	22 square centimetres	12 + 10 = 22 square centimetres; joining only adds area.
5	9 centimetres	36 divided by 4 = 9 centimetres.
6	28 square centimetres	8 times 5 = 40 and 3 times 4 = 12, so 40 minus 12 = 28 square centimetres.
7	60 square centimetres	10 times 8 = 80 and 4 times 5 = 20, so 80 minus 20 = 60 square centimetres.
8	2000 tiles	250 times 200 = 50000 square centimetres, and 50000 divided by 25 = 2000 tiles.
9	32 square centimetres	8 times 8 = 64, and 64 divided by 2 = 32 square centimetres.
10	25 square centimetres	20 divided by 4 = 5 centimetres per side, so 5 times 5 = 25 square centimetres.

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.

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