Primary 3 Mathematics Practice Paper 1

TuitionGoWhere Practice Paper - Mathematics Primary 3

Answer Key with Step-by-Step Working

School: TuitionGoWhere Primary School (AI)
Subject: Mathematics
Level: Primary 3
Total Marks: 40

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Section A: Multiple Choice Questions (10 marks)

1. Answer: B) 70

Explanation: In 573, the digit 7 is in the tens place. Therefore, its value is 7 × 10 = 70.

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2. Answer: D) 743

Working:

  486
+ 257
-----
  743

6 + 7 = 13 (write 3, carry 1) 8 + 5 + 1 = 14 (write 4, carry 1) 4 + 2 + 1 = 7

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3. Answer: A) 437

Working:

  805
- 368
-----
  437

Regroup: 5 cannot minus 8, borrow from tens. 15 - 8 = 7 9 - 6 = 3 (after regrouping) 8 - 4 = 4 (after regrouping)

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4. Answer: C) 56

Working: 7 × 8 = 56

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5. Answer: C) 8

Working: 72 ÷ 9 = 8 (since 8 × 9 = 72)

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6. Answer: C) 1/2

Explanation: When the numerator is the same (all are 1), the fraction with the smallest denominator is the largest. 2 is the smallest denominator, so 1/2 is the largest.

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7. Answer: B) 300 cm

Working: 1 m = 100 cm, so 3 m = 3 × 100 = 300 cm

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8. Answer: B) 3:30

Explanation: Hour hand at 3 and minute hand at 6 means 3 hours and 30 minutes (6 × 5 = 30 minutes).

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9. Answer: B) 26 cm

Working: Perimeter = 2 × length + 2 × width = 2 × 8 + 2 × 5 = 16 + 10 = 26 cm

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10. Answer: C) Square

Explanation: A square has 4 equal sides and 4 right angles (90°). A rectangle has 4 right angles but only opposite sides are equal.

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Section B: Short Answer Questions (30 marks)

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11. Answer: 296, 629, 692, 962 (2 marks)

Explanation: Compare the hundreds digit first, then tens, then ones.

• 296 (smallest - hundreds digit is 2)
• 629 (hundreds digit is 6, tens digit is 2)
• 692 (hundreds digit is 6, tens digit is 9)
• 962 (largest - hundreds digit is 9)

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12. (4 marks - 2 marks each)

(a) 324 + 489 = 813

  324
+ 489
-----
  813

(b) 700 - 256 = 444

  700
- 256
-----
  444

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13. Multiplication table: (4 marks - 1 mark each)

×	6	7
8	48	56
9	54	63

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14. Answer: 48 pencils (2 marks)

Working: Number of pencils = 6 × 8 = 48 pencils

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15. Answer: 9 marbles (2 marks)

Working: Number of marbles each child gets = 63 ÷ 7 = 9 marbles

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16. (2 marks)

Shaded diagram (any 3 boxes shaded):

|███|███|███|   |   |   |   |   |

Explanation: The rectangle is divided into 8 equal parts. Shade any 3 parts to represent 3/8.

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17. (2 marks - 1 mark each)

(a) 2/5 < 3/5

Explanation: Same denominator, so compare numerators. 2 < 3.

(b) 4/6 = 2/3

Explanation: 4/6 simplified = 2/3 (divide both by 2)

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18. Answer: 4 m 23 cm (3 marks)

Working:

  2 m  45 cm
+ 1 m  78 cm
-------------
  3 m 123 cm
= 4 m  23 cm

45 + 78 = 123 cm = 1 m 23 cm 2 + 1 + 1 = 4 m Total = 4 m 23 cm

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19. Answer: 1 kg 570 g (3 marks)

Working:

  3 kg 250 g
- 1 kg 680 g

250 g < 680 g, so regroup: 2 kg 1250 g - 1 kg 680 g

  2 kg 1250 g
- 1 kg  680 g
--------------
  1 kg  570 g

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20. (6 marks)

(a) 9 stars (2 marks)

Working: Pattern 1: 1 star Pattern 2: 3 stars Pattern 3: 5 stars Pattern 4: 7 stars Pattern 5: 9 stars (add 2 to previous)

(b) Add 2 stars to the previous pattern OR Each pattern has 2 more stars than the previous pattern (2 marks)

Explanation: The pattern shows odd numbers: 1, 3, 5, 7, 9... Each term increases by 2.

(c) Pattern 8 (2 marks)

Working: Pattern 1: 1 star Pattern 2: 3 stars Pattern 3: 5 stars Pattern 4: 7 stars Pattern 5: 9 stars Pattern 6: 11 stars Pattern 7: 13 stars Pattern 8: 15 stars

OR using formula: 2n - 1 = 15, so n = 8

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Marking Summary

Section	Marks
Section A (Q1-10)	10
Section B (Q11-20)	30
Total	40

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End of Answer Key