How do I tell the tens digit from the ones digit?

From the right, the first digit is the ones and the second is the tens, so 68 has tens digit 6.

How do I compare two two-digit numbers?

Compare the tens digits first, and only compare the ones when the tens are equal.

What should I watch in an addition with carrying?

When the ones reach ten, write 0 and carry 1 to the tens, for example 47 + 5 = 52.

P1 Maths Numbers to 100 Paper 4: Error Review

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	20
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: P1 Maths Numbers to 100
Level	P1

02　Questions (10 items)

FoundationHow many tens and how many ones make 52?
FoundationWhat number is 2 more than 38?
FoundationCounting back from 84: 84, 83, 82. What comes next?
IntermediateWhich is smaller, 56 or 65?
IntermediateWhat is 28 + 30?
IntermediateWhat is 100 minus 40?
ChallengeA number has tens digit 9 and ones digit 0. How far is it from 100?
ChallengeStart at 5 and add 20 each time: 5, 25, 45. What is the fourth number?
ChallengeUsing the digit cards 6 and 9 once each, what is the smallest two-digit number you can make?
Error redoError review: a pupil works out 47 + 5 and writes 42. Is that right, and what is the correct answer?

03　Answers and one-line notes

#	Answer	One-line note
1	5 tens and 2 ones	In 52 the tens digit is 5 and the ones digit is 2, so it is 5 tens and 2 ones.
2	40	The ones make 8 + 2 = 10, so write 0 and carry 1 to the tens, giving 40.
3	81	Each step subtracts 1, so after 82 comes 81.
4	56	Compare the tens digits first: 5 is smaller than 6, so 56 is the smaller number.
5	58	Adding 3 tens to 28 turns the tens digit from 2 into 5, giving 58.
6	60	Taking 4 tens away from 100 leaves 6 tens, which is 60.
7	10	The number is 90, and 100 − 90 = 10.
8	65	Adding 20 to 45 gives 65, so that is the fourth number.
9	69	Put the smaller digit 6 in the tens place and 9 in the ones place to get 69.
10	No, the correct answer is 52	The ones give 7 + 5 = 12, so write 2 and carry 1; the tens become 4 + 1 = 5, giving 52. The pupil forgot the carry.

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.