Primary 4 · Mathematics · Decimals
Decimals questions for Primary 4 Maths
10 questions to work through online. Answer and you get the working straight away, then a score at the end. No sign-up, and you can retake it as often as you like.
- Decimal place value
- Adding decimals
- Subtracting decimals
- Comparing decimals
- Fractions as decimals
- Rounding decimals
- Multiplying decimals
- Dividing decimals
- Decimals in measurement
- Word problem
Answers and explanations for all 10 questions
Every answer with the reasoning behind it. Worth reading after you have tried the set — or on its own, if you are a parent marking it.
In 47.36, what does the digit 3 stand for?
Answer: 0.3
The 3 sits in the tenths place, one step after the decimal point, so it stands for 0.3.
3.45 + 2.78 = ?
Answer: 6.23
3.45 + 2.78 = 6.23 — line up the decimal points before adding.
8 − 3.65 = ?
Answer: 4.35
8 − 3.65 = 4.35. Write 8 as 8.00 so the columns line up.
Which of these decimals is the largest?
Answer: 6.09
All four are 6 and a bit. Compare tenths first: 6.09 has 0 tenths and 9 hundredths, which beats the rest.
Write 3/4 as a decimal.
Answer: 0.75
3/4 is 3 ÷ 4 = 0.75.
Round 12.68 to 1 decimal place.
Answer: 12.7
The hundredths digit is 8, which is 5 or more, so 12.68 rounds up to 12.7.
4.5 × 3 = ?
Answer: 13.5
4.5 × 3 = 13.5.
9.6 ÷ 4 = ?
Answer: 2.4
9.6 ÷ 4 = 2.4.
A ribbon is 2.45 m long. How long is it in centimetres?
Answer: 245 cm
1 m = 100 cm, so 2.45 m = 2.45 × 100 = 245 cm.
A tank held 10 litres of water. 3.45 litres were used. How much water was left?
Answer: 6.55 ℓ
10 − 3.45 = 6.55, so 6.55 ℓ is left.