Which level is it for?

P1, for securing numbers to 20 and simple addition and subtraction.

How many items are in this paper?

Ten: three basic, three intermediate, three challenge and one redo item.

How long should it take?

About 20 to 30 minutes; finish under timing before checking.

Are these past public examination questions?

No. All items are original and are not past papers or official marking schemes.

What if a child gets one wrong?

Read the one-line explanation, then redo a similar item to locate the gap.

P1 Maths Numbers to 20 Paper 3: Challenge

2026-11-09

Tutor Prep Guide · P1 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	25
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: P1 Maths: Numbers to 20
Level	P1

02　Questions (10 items)

Foundation18 – 7 + 4 = ?
FoundationA number plus 8 gives 15. What is the number?
FoundationIf 12 – 5 = 7, write the matching addition sentence.
Intermediate5 + 5 + 5 + 5 = ?
IntermediateTake 6 away from 20 twice. What is left?
IntermediateThree consecutive numbers add up to 18. What is the smallest?
ChallengeHow many whole numbers lie strictly between 15 and 19?
ChallengeI have $14, which is $6 more than my sister. How much does she have?
Challenge12 + __ = 20 – 3. What goes in the box?
Error redo9 + 6 = ? (Redo: 14 was the earlier answer)

03　Answers and one-line notes

#	Answer	One-line note
1	15	Work left to right: 18 – 7 = 11 and 11 + 4 = 15.
2	7	Work backwards with subtraction: 15 – 8 = 7.
3	7 + 5 = 12	A subtraction can be rewritten as addition: the difference plus the number taken away gives the start.
4	20	Four 5s added together make 5 x 4 = 20.
5	8	20 – 6 = 14 and 14 – 6 = 8.
6	5	The numbers are 5, 6 and 7, so the smallest is 5.
7	3	The numbers between them are 16, 17 and 18, so there are 3.
8	$8	She has less, so 14 – 6 = 8 dollars.
9	5	The right side is 20 – 3 = 17, and 17 – 12 = 5.
10	15	9 plus 1 makes 10, then add 5 to get 15; 14 is one short.

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.

Book a Maths tutor 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.