How do you divide by a decimal?

Scale the divisor up to a whole number and scale the dividend by the same power of ten; the quotient is unchanged.

Why is dividing by 0.5 the same as multiplying by 2?

0.5 is one half, and dividing by one half is multiplying by 2.

Should trailing zeros be kept?

Keep them while working to line things up, then drop them in the answer, so 5.40 becomes 5.4.

P4 Maths Four Operations with Decimals Paper 2: Intermediate

2026-11-09

Tutor Prep Guide · P4 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: P4 Maths: Four Operations with Decimals
Level	P4

02　Questions (10 items)

FoundationWhat is 0.45 times 12?
FoundationWhat is 6.4 times 0.25?
FoundationWhat is 45.6 divided by 0.6?
IntermediateWhat is 3.75 divided by 0.5?
IntermediateWhat is 0.8 times 0.35?
IntermediateWhat is 2.4 times 15?
ChallengeWhat is 12.6 divided by 3.6?
ChallengeWhat is 9.99 divided by 3?
ChallengeA bag of sweets weighs 0.35 kg. What is the total mass of 24 bags?
Error redoError review: a student worked out 0.2 times 0.3 as 0.6. What is the correct answer?

03　Answers and one-line notes

#	Answer	One-line note
1	5.4	45 times 12 = 540, and two decimal places give 5.40, that is 5.4.
2	1.6	Multiplying by 0.25 is the same as taking a quarter, so 6.4 divided by 4 = 1.6.
3	76	Scale both numbers by 10: 456 divided by 6 = 76.
4	7.5	Dividing by 0.5 is the same as multiplying by 2, so 3.75 times 2 = 7.5.
5	0.28	8 times 35 = 280, and three decimal places give 0.280, that is 0.28.
6	36	24 times 15 = 360, and one decimal place gives 36.0, that is 36.
7	3.5	Scale both numbers by 10: 126 divided by 36 = 3.5.
8	3.33	999 divided by 3 = 333, and two decimal places give 3.33.
9	8.4 kg	35 times 24 = 840, and two decimal places give 8.40, that is 8.4 kg.
10	0.06	2 times 3 = 6, and two decimal places give 0.06; writing 0.6 drops a decimal place.

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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