Primary 5 Mathematics Decimals Quiz

P5 Maths Quiz: Decimals

Questions: 20 Time: 35 minutes Total Marks: 50

Section A: Multiple Choice (10 marks)

Choose the best answer. [2 marks each]

1. What is 0.456 rounded to 1 decimal place?

   • A) 0.4
   • B) 0.5
   • C) 0.46
   • D) 0.45

2. Which decimal is equivalent to 3/8?

   • A) 0.375
   • B) 0.38
   • C) 0.325
   • D) 0.35

3. What is 4.56 × 100?

   • A) 45.6
   • B) 456
   • C) 4560
   • D) 0.456

4. Arrange in descending order: 0.75, 0.705, 0.7, 0.075

   • A) 0.75, 0.7, 0.705, 0.075
   • B) 0.75, 0.705, 0.7, 0.075
   • C) 0.075, 0.7, 0.705, 0.75
   • D) 0.705, 0.75, 0.7, 0.075

5. What is 8.45 - 3.7?

   • A) 4.75
   • B) 5.25
   • C) 4.25
   • D) 5.75

Section B: Short Answer (20 marks)

Show your working clearly. [4 marks each]

6. Round these decimals: a) 6.847 to 2 decimal places b) 0.0956 to 3 decimal places

7. Calculate: 12.45 + 8.697 + 0.58

8. Find: 15.6 ÷ 1.2

9. Convert these fractions to decimals: a) 7/10 b) 3/25

10. Multiply: 2.4 × 0.35

Section C: Word Problems (20 marks)

Use model drawing or show your working clearly. [5 marks each]

11. Shopping Problem Siti bought 3 items: a book for $12.80, a pen for$4.65, and a calculator for $18.95. She paid with two$20 notes. How much change did she receive?

12. Running Track The school running track is 0.4 km long. If Jason runs 6.5 laps, how many kilometres does he run altogether?

13. Measurement Problem A recipe needs 1.25 kg of flour. Mrs. Chen has 0.8 kg of flour at home. How much more flour does she need to buy? Give your answer in grams.

14. Price Calculation A kilogram of apples costs $4.80. How much do 2.75 kg of apples cost? Round your answer to the nearest 10 cents.

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End of Quiz

Check your calculations and decimal place values carefully.

P5 Maths Quiz: Decimals - ANSWERS

Questions: 20 Time: 35 minutes
Total Marks: 50

Section A: Multiple Choice (10 marks)

2 marks each

1. B) 0.5

   • Look at 2nd decimal place: 5
   • Since 5 ≥ 5, round up: 0.5

2. A) 0.375

   • 3/8 = 3 ÷ 8 = 0.375

3. B) 456

   • 4.56 × 100: Move decimal point 2 places right

4. B) 0.75, 0.705, 0.7, 0.075

   • Compare: 0.750, 0.705, 0.700, 0.075
   • Descending order: largest to smallest

5. A) 4.75

   • 8.45 - 3.7 = 8.45 - 3.70 = 4.75

Section B: Short Answer (20 marks)

4 marks each

6. Rounding: a) 6.847 to 2 d.p. = 6.85 (look at 3rd d.p.: 7 ≥ 5, round up) b) 0.0956 to 3 d.p. = 0.096 (look at 4th d.p.: 6 ≥ 5, round up)

7. Addition: 12.45 + 8.697 + 0.58 = 21.727 (Align decimal points: 12.450 + 8.697 + 0.580)

8. Division: 15.6 ÷ 1.2 = 156 ÷ 12 = 13 (Multiply both by 10 to remove decimals)

9. Convert fractions: a) 7/10 = 0.7 b) 3/25 = 12/100 = 0.12

10. Multiplication: 2.4 × 0.35 = 0.84 (24 × 35 = 840, place decimal: 1+2=3 places)

Section C: Word Problems (20 marks)

5 marks each

11. Shopping Problem Total cost: $12.80 +$4.65 + $18.95 =$36.40 Amount paid: 2 × $20 =$40.00 Change: $40.00 -$36.40 = $3.60

12. Running Track Track length: 0.4 km Laps: 6.5 Total distance: 0.4 × 6.5 = 2.6 km

13. Measurement Problem Needs: 1.25 kg Has: 0.8 kg More needed: 1.25 - 0.8 = 0.45 kg In grams: 0.45 × 1000 = 450 grams

14. Price Calculation Price per kg: $4.80 Amount: 2.75 kg Total cost:$4.80 × 2.75 = $13.20 Rounded to nearest 10 cents: **$13.20**

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Marking Scheme:

• Section A: 1 mark for correct answer, 1 mark for method (where applicable)
• Section B: 2 marks for method, 2 marks for correct answer
• Section C: 2 marks for understanding, 2 marks for working, 1 mark for final answer

Total: 50 marks