What does this error review paper cover?

It targets the usual slips: adding the denominators, subtracting a fraction from 1, comparing fractions with the same numerator and finding a fraction of an amount.

Why do the denominators stay the same when adding?

The denominator counts the equal parts, and the parts are the same size, so only the number of parts taken is added.

How do you find a fraction of an amount?

Divide the amount by the denominator, then multiply by the numerator, for example 18 divided by 3 times 2 = 12.

P3 Maths Introduction to Fractions Paper 4: Error Review

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 Fractions
Level	P3

02　Questions (10 items)

FoundationWhat is 2/9 plus 5/9?
FoundationWhat is 1 minus 4/11?
FoundationWhich is larger, 3/8 or 3/5?
IntermediateWhat is 2/3 of 18 sweets?
IntermediateWhat is 7/12 minus 2/12?
IntermediateWhat is 3/10 plus 4/10?
ChallengeA box of 24 chocolates has 5/8 eaten. How many are left?
ChallengeWhat is 1 minus 3/9 minus 2/9?
ChallengeHow does 5/5 compare with 1?
Error redoError review: a student answered 5/14 for 2/7 plus 3/7. What is the correct answer?

03　Answers and one-line notes

#	Answer	One-line note
1	7/9	With the same denominator the denominator stays 9 and only the numerators add: 2 plus 5 = 7, so the answer is 7/9.
2	7/11	Write 1 as 11/11, then 11/11 minus 4/11 = 7/11 and the denominator stays 11.
3	3/5 is larger	With the same numerator, a smaller denominator gives larger parts, so 3/5 is greater than 3/8.
4	12 sweets	18 divided by 3 = 6 sweets per part, and 2 parts is 6 times 2 = 12 sweets.
5	5/12	Subtract the numerators and keep the denominator: 7 minus 2 = 5, so the answer is 5/12.
6	7/10	The denominator stays 10 and 3 plus 4 = 7, so the answer is 7/10, not 7/20.
7	9 chocolates	The part left is 1 minus 5/8 = 3/8, and 24 divided by 8 times 3 = 9 chocolates.
8	4/9	First 3/9 plus 2/9 = 5/9, then 9/9 minus 5/9 = 4/9.
9	They are equal	A fraction with the same numerator and denominator equals 1, so 5/5 = 1.
10	5/7	Keep the denominator and add the numerators to get 5/7; adding the denominators to 14 is the usual mistake.

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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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.