Which chapter does this paper follow?

It follows the Primary 5 lesson plan on the four operations with decimals: alignment, decimal places, division by a decimal and estimation. Every value is newly written, not copied from the chapter examples.

Why estimate before every item?

The usual loss in decimal work is not the arithmetic but the position of the point. An estimate shows at once when an answer is ten or a hundred times out.

Primary 5 Maths: Four Operations with Decimals — Practice Paper 1 (10 Questions)

2026-10-29

Tutor Prep Guide · Primary Maths

Paper 1 follows the chapter in four steps: line up the points when adding or subtracting, multiply as integers then place the point, scale both numbers when dividing by a decimal, and estimate to check the size.

Quick answer　10 questions, about 25 minutes. Items 06 and 10 test scaling both numbers, items 05 and 08 test decimal places and estimation; mark after finishing.

01　Paper details (check answers afterwards)

Item	Detail
Questions	10 questions
Suggested time	25 minutes
Difficulty mix	Foundation 4 · Intermediate 3 · Challenge 2 · Error redo 1
Chapter	Chapter: Primary 5 Maths: Four Operations with Decimals — Tutor Lesson Plan
Level	Primary 5

02　Questions (10 items)

Foundation9.05 + 3.8 = ?
Foundation12.5 − 4.75 = ?
Foundation3.6 × 2.5 = ?
Foundation4.8 ÷ 1.2 = ?
Intermediate2.4 × 0.5 = ?
Intermediate0.6 ÷ 0.25 = ?
Intermediate7.2 ÷ 0.9 = ?
Challenge6.75 + 3.25 − 2.4 = ? (estimate the answer first)
ChallengeA pen costs 4.5 dollars. Three are bought and paid with 20 dollars. How much change?
Error redo0.36 ÷ 0.4 = ? (common slip: changing only the divisor and answering 0.009)

03　Answers and one-line notes

#	Answer	One-line note
1	12.85	Line the points up: write 3.8 as 3.80 and then add.
2	7.75	Pad 12.5 to 12.50 first, or the borrowing goes wrong.
3	9	Treat them as integers: 36 × 25 = 900; the factors carry two decimal places, so 9.00, written 9.
4	4	The divisor has one decimal place, so multiply both by 10: 48 ÷ 12 = 4.
5	1.2	24 × 5 = 120, two decimal places gives 1.20, so 1.2; multiplying by a number below 1 makes it smaller.
6	2.4	Multiply both by 100 to get 60 ÷ 25; changing only the divisor gives 0.024.
7	8	One decimal place, so multiply both by 10: 72 ÷ 9 = 8; dividing by a number below 1 makes it larger.
8	7.6	6.75 + 3.25 makes exactly 10, minus 2.4 gives 7.6; estimating 7 to 8 first keeps the answer sane.
9	$6.5	4.5 × 3 = 13.5 first, then 20 − 13.5; the change and the price must line up on the point.
10	0.9	Multiply both by 10: 3.6 ÷ 4 = 0.9; the dividend must be scaled as well.

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.