Primary 1 Mathematics Addition Subtraction Quiz

Primary 1 Mathematics Quiz – Addition Subtraction

Answer Key

Section A: Basic Addition (1 mark each)

Question 1

• Answer: 8
• Working: 5 + 3 = 8
• Marks: 1
• Marking notes: Award 1 mark for the correct answer. No working required for Section A.

Question 2

• Answer: 10
• Working: 4 + 6 = 10
• Marks: 1
• Marking notes: Award 1 mark for the correct answer.

Question 3

• Answer: 15
• Working: 7 + 8 = 15
• Marks: 1
• Marking notes: Award 1 mark for the correct answer. Common mistake: students may add 7 + 8 = 14 (forgetting to carry). Check carefully.

Question 4

• Answer: 14
• Working: 9 + 5 = 14
• Marks: 1
• Marking notes: Award 1 mark for the correct answer.

Question 5

• Answer: 13
• Working: 6 + 7 = 13
• Marks: 1
• Marking notes: Award 1 mark for the correct answer.

Section B: Basic Subtraction (1 mark each)

Question 6

• Answer: 6
• Working: 10 − 4 = 6
• Marks: 1
• Marking notes: Award 1 mark for the correct answer.

Question 7

• Answer: 12
• Working: 15 − 3 = 12
• Marks: 1
• Marking notes: Award 1 mark for the correct answer. Students may subtract from the tens place incorrectly; check that they subtract from the ones place.

Question 8

• Answer: 6
• Working: 13 − 7 = 6
• Marks: 1
• Marking notes: Award 1 mark for the correct answer. Common mistake: 13 − 7 = 5 (miscounting).

Question 9

• Answer: 9
• Working: 18 − 9 = 9
• Marks: 1
• Marking notes: Award 1 mark for the correct answer.

Question 10

• Answer: 5
• Working: 11 − 6 = 5
• Marks: 1
• Marking notes: Award 1 mark for the correct answer.

Section C: Addition and Subtraction with Pictures and Stories (2 marks each)

Method mark: 1 mark for correct operation. Answer mark: 1 mark for correct final answer with unit.

Question 11

• Answer: 13 stickers
• Working: 8 + 5 = 13
• Marks: 2
• Marking notes: Award 1 method mark for writing 8 + 5 (or showing a correct counting-on strategy). Award 1 answer mark for 13 stickers. Accept 13 without unit for the answer mark, but best practice is to include "stickers".

Question 12

• Answer: 8 birds
• Working: 14 − 6 = 8
• Marks: 2
• Marking notes: Award 1 method mark for writing 14 − 6. Award 1 answer mark for 8 birds. Common mistake: students may add instead of subtract (14 + 6 = 20). Check that the operation matches the context ("fly away" means subtraction).

Question 13

• Answer: 16 marbles
• Working: 7 + 9 = 16
• Marks: 2
• Marking notes: Award 1 method mark for writing 7 + 9. Award 1 answer mark for 16 marbles. Common mistake: 7 + 9 = 15 (miscounting).

Question 14

• Answer: 12 sweets
• Working: 20 − 8 = 12
• Marks: 2
• Marking notes: Award 1 method mark for writing 20 − 8. Award 1 answer mark for 12 sweets.

Question 15

• Answer: 13 pages
• Working: 6 + 7 = 13
• Marks: 2
• Marking notes: Award 1 method mark for writing 6 + 7. Award 1 answer mark for 13 pages.

Section D: Missing Numbers (2 marks each)

Method mark: 1 mark for correct inverse operation. Answer mark: 1 mark for correct missing number.

Question 16

• Answer: 8
• Working: 14 − 6 = 8, so 8 + 6 = 14
• Marks: 2
• Marking notes: Award 1 method mark for using subtraction to find the missing number (14 − 6). Award 1 answer mark for 8.

Question 17

• Answer: 8
• Working: 17 − 9 = 8, so 17 − 8 = 9
• Marks: 2
• Marking notes: Award 1 method mark for using subtraction (17 − 9). Award 1 answer mark for 8.

Question 18

• Answer: 7
• Working: 15 − 8 = 7, so 7 + 8 = 15
• Marks: 2
• Marking notes: Award 1 method mark for using subtraction (15 − 8). Award 1 answer mark for 7.

Section E: Word Problems (3 marks each)

Method mark 1: 1 mark for correct first step. Method mark 2: 1 mark for correct second step. Answer mark: 1 mark for correct final answer with unit.

Question 19

• Answer: 16 fruits
• Working:
  • Step 1: 12 + 9 = 21 (total fruits)
  • Step 2: 21 − 5 = 16 (fruits left after selling 5 apples)
• Marks: 3
• Marking notes: Award 1 mark for correctly adding 12 + 9 = 21. Award 1 mark for correctly subtracting 21 − 5 = 16. Award 1 mark for the final answer "16 fruits". Common mistake: students may only subtract 5 from 12 (getting 7) and forget to add the oranges. Another common mistake: students may subtract 5 from 9 instead.

Question 20

• Answer: 9 toy cars
• Working: 15 − 6 = 9. Ben had 9 toy cars at first.
• Marks: 3
• Marking notes: Award 1 mark for identifying that this is a "working backwards" problem requiring subtraction. Award 1 mark for the correct calculation 15 − 6 = 9. Award 1 mark for the final answer "9 toy cars". Common mistake: students may add 15 + 6 = 21 instead of subtracting. Look for understanding that "gives him more" means the original amount is smaller.

Summary of Marks

End of Answer Key