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Primary 1 Maths Mock Paper in English: Numbers to 100, Addition and Subtraction, with Answers
TUTORZONE ORIGINAL MOCK PAPER · PRIMARY 1 MATHEMATICS (ENGLISH) · EDB UNITS 1N1-1S3
Written to the Education Bureau primary Mathematics learning units for P1 (1N1-1S3): 20 questions, 40 marks, 45 minutes, with every question and answer in English. Mathematics is taught and examined in English at English-medium primary schools such as St Paul’s Co-educational College Primary School, DBS Primary Division, Diocesan Girls’ Junior School and St Joseph’s Primary School, so the whole paper is in English. Full answers and a mark scheme are included.
What does the Primary 1 paper cover?
Direct answer: the paper follows the EDB P1 learning units: Number (numbers to 20 and to 100, addition and subtraction), Measures (length, money, time) and Shape and Space (3-D shapes, 2-D shapes, direction). 20 questions, 40 marks, 45 minutes, all questions and answers in English.
This paper at a glance (sections, marks and timing)
| Component | Content | Weighting | Duration |
|---|---|---|---|
| Section A Quick computation | 12 short questions, 1 mark each: number words, addition and subtraction within 20, place value, comparing lengths, coins, time, counting sides | 12 | 12 min |
| Section B Short questions | 4 questions, 2 marks each: two-digit addition and subtraction with borrowing, length subtraction, money totals | 8 | 13 min |
| Section C Word problems | 4 questions, 5 marks each: two-step word problems, shopping and change, class totals | 20 | 20 min |
The table above describes how this paper is laid out; it is not an official examination structure from the EDB or any school. P1 pacing: 45 minutes for 20 questions, a little over 2 minutes each. The marks that go missing are rarely wrong arithmetic – they are missing number sentences and misread instructions. Check each answer immediately with the inverse operation (73 – 27 must return 46) instead of saving the check-up for the end.
How this paper was built
The paper was written by the TutorZone editorial team from the learning units in the Education Bureau’s Supplement to the Mathematics Education KLA Curriculum Guide: Learning Content of Primary Mathematics (2017) for P1 – Number (1N1-1N4), Measures (1M1-1M4) and Shape and Space (1S1-1S3). Every question and answer is original; no school paper is reproduced.
Why English throughout: Mathematics is taught and examined in English at the English-medium primary schools this paper is written for – St Paul’s Co-educational College Primary School, DBS Primary Division, Diocesan Girls’ Junior School, St Joseph’s Primary School – so the questions and answers are in English.
Pacing
| Section | Marks | Suggested time | What to do first |
|---|---|---|---|
| Section A Quick computation | 12 | 12 min | Do these first, about 30 seconds each; skip anything unsure and return later |
| Section B Short questions | 8 | 13 min | Show the number sentence; a bare answer loses the working mark |
| Section C Word problems | 20 | 20 min | Underline in all / left / how many more before choosing add or subtract |
How should the 45 minutes be split across 20 questions?
Direct answer: Section A 12 questions in 12 minutes, Section B 4 questions in 13 minutes, Section C 4 questions in 20 minutes, leaving the last 2 minutes to check units and blanks. Give up on a question after 30 seconds and come back to it.
Section A: Quick computation (12 questions, 1 mark each)
Write the answer only; no working is needed here.
Question 1 (1 mark)
Write 18 in words.
Question 2 (1 mark)
9 + 7 = ?
Question 3 (1 mark)
15 − 8 = ?
Question 4 (1 mark)
Which number is greater, 46 or 64?
Question 5 (1 mark)
What is the next number? 30, 32, 34, ___
Question 6 (1 mark)
3 tens and 5 ones make ___.
Question 7 (1 mark)
___ + 6 = 14
Question 8 (1 mark)
A pencil is 12 cm long. A ruler is 20 cm long. How much longer is the ruler?
Question 9 (1 mark)
How many 10-cent coins make 50 cents?
Question 10 (1 mark)
The clock shows 4 o’clock. What time is it 2 hours later?
Question 11 (1 mark)
How many sides does a triangle have?
Question 12 (1 mark)
What number is 1 more than 59?
Section B: Short questions (4 questions, 2 marks each)
A number sentence or column working is required.
Question 1 (2 marks)
46 + 27 = ?
Question 2 (2 marks)
82 − 35 = ?
Question 3 (2 marks)
A ribbon is 100 cm long. 35 cm is cut off. How many centimetres are left?
Question 4 (2 marks)
I have two $2 coins and three $1 coins. How much money do I have?
Section C: Word problems (4 questions, 5 marks each)
Give the number sentence, the answer and the unit; answer (a) and (b) on separate lines.
Question 1 (5 marks)
There are 24 red stickers and 18 blue stickers. (a) How many stickers are there in all? (b) How many more red stickers than blue stickers are there?
Question 2 (5 marks)
A packet holds 10 sweets. May buys 3 packets and then eats 12 sweets. How many sweets does she have left?
Question 3 (5 marks)
A class has 32 pupils. 19 of them are girls. (a) How many boys are there? (b) 5 pupils are absent today. How many pupils are present?
Question 4 (5 marks)
Ken has 46 marbles. His sister gives him 25 more marbles. He then gives 18 marbles to his friend. How many marbles does Ken have now?
Do the answers show working and marks?
Direct answer: yes. Every question is followed by an answer block that shows the number sentence (including the carrying in 46 + 27 = 73), the answer and the unit; Section C answers are split into (a) and (b) with the marks labelled so a parent can tick each part.
Section A answers and marks
Question 1
eighteen
Question 2
16. Count on from 9: 10, 11, … 16.
Question 3
7. Think 8 + 7 = 15, so 15 − 8 = 7.
Question 4
64. 64 has 6 tens; 46 has only 4 tens.
Question 5
36. The pattern counts on in twos, so add 2 to 34.
Question 6
35. 3 tens = 30, and 30 + 5 = 35.
Question 7
8. 14 − 6 = 8, and 8 + 6 = 14 checks it.
Question 8
8 cm. Compare by subtraction: 20 cm − 12 cm = 8 cm.
Question 9
5 coins. 50 cents ÷ 10 cents = 5.
Question 10
6 o’clock. Counting on 2 hours from 4 gives 6.
Question 11
3 sides. A triangle has 3 straight sides and 3 corners.
Question 12
60. 59 + 1 = 60; the 9 ones become 10, which makes one more ten.
Section B answers and marks
Question 1
Add the ones: 6 + 7 = 13, so write 3 and carry 1 ten. Add the tens: 4 + 2 + 1 = 7. Answer 73.
Question 2
2 − 5 is not possible, so borrow 1 ten: 12 − 5 = 7. Tens left: 7 − 3 = 4. Answer 47.
Question 3
100 cm − 35 cm = 65 cm.
Question 4
2 × $2 = $4 and 3 × $1 = $3, so $4 + $3 = $7.
Section C answers and marks
Question 1
(a) 24 + 18 = 42 stickers. (b) 24 − 18 = 6 more red stickers.
Part (b) asks for the difference, not the total – read the question word by word.
Question 2
3 packets: 3 × 10 = 30 sweets. Left: 30 − 12 = 18 sweets.
Question 3
(a) 32 − 19 = 13 boys. (b) 32 − 5 = 27 pupils present.
Question 4
46 + 25 = 71, then 71 − 18 = 53 marbles. Two steps: add first, subtract second.
Where do P1 marks usually go?
Direct answer: three places: missing units (cm, $, pupils), misreading left / how many more and so choosing the wrong operation, and forgetting to reduce the tens digit after borrowing. The pitfalls table shows the correct move for each.
Where these marks are usually lost
| Mistake | What it looks like | What it costs | Instead |
|---|---|---|---|
| Missing units | Writing 8 when the question asks for a length | The whole mark goes, even with the right number | cm for length, $ for money, pupils or books for counts |
| Misreading left / how many more | Adding when the question needs a subtraction | The whole 5-mark question is lost | Circle the key words and say the number sentence aloud in words |
| Forgetting to reduce the tens after borrowing | 82 – 35 worked as 57 | An error of 10 – a conceptual slip | Put a dot on the tens digit as soon as you borrow |
| Skipping the number sentence | Writing 73 straight after 46 + 27 | Working marks are lost in Section C | Write one line per question: 46 + 27 = 73 |
How to use this paper
Timed run: split the 45 minutes into 12 / 13 / 20, use a timer, and do not look anything up. Mark only the answers first, before you look at any working, so you see the real score.
Marking run: score yourself against the mark scheme, line by line – especially whether the number sentence and the unit were written. Four out of five lost marks at P1 come from those two omissions.
Seven days later: copy each wrong question into an error log (question, correct number sentence, the exact wrong step) and redo the whole paper. Success means the same question is right the second time.
What comes after this paper?
Direct answer: log every wrong question with its correct number sentence and the wrong step; redo the paper seven days later; then move to the P2 and P3 papers in the same series, one to two weeks apart, so the difficulty rises in steps.
FAQ
Is this a paper from SPCC, DBS or St Joseph’s?
No. Every question is an original TutorZone question written from the EDB primary Mathematics learning units. There is no relationship with those schools; their names only describe the level.
Why is the paper in English even on the Chinese pages?
Because Mathematics is taught and examined in English at these English-medium primary schools, so the questions the children actually meet are in English. Practising in Chinese adds a translation step on exam day.
Should a P1 child work against a timer?
Yes. Primary school assessments typically give 40-50 minutes for 15-20 questions, and timed practice builds the habit of skipping a question and coming back to it.
Is one paper enough?
No. Work through it timed, mark it against the scheme, redo it seven days later, then move to the neighbouring grade papers in the same series.
Official references
| Resource | What to check |
|---|---|
| https://www.edb.gov.hk/attachment/en/curriculum-development/kla/ma/curr/pmc2017_e.pdf | EDB Learning Content of Primary Mathematics (2017): the P1 learning units 1N1-1S3 |
| https://www.tutorzone.com.hk/en-primary-maths-p2-mock-2027/ | The next paper in the series (P2), same English layout |
| https://www.tutorzone.com.hk/en-practice-questions/ | TutorZone practice area: mock papers and drilling guides |
Related: practice area · Primary 2 paper · Primary 3 paper
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