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Primary 2 Mathematics Addition Subtraction Quiz

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Questions

Primary 2 Mathematics Quiz - Addition Subtraction

Name: ________________________
Class: Primary 2 _______
Date: ________________________
Score: _______ / 30

Duration: 45 minutes
Total Marks: 30

Instructions:

Answer all questions.
Show your working clearly in the space provided.
Write your answers in the blanks or boxes provided.
Check your work carefully before handing in.

Section A: Mental Calculation (6 marks)

Questions 1–6 carry 1 mark each. Do these mentally and write the answer only.

345 + 200 = _______
680 − 300 = _______
450 + 30 = _______
720 − 50 = _______
234 + 9 = _______
560 − 8 = _______

Section B: Addition and Subtraction Within 1000 (14 marks)

Questions 7–16 carry 1–2 marks each. Show your working using the standard algorithm (column method).

Find the sum of 246 and 352.
Working:
Answer: _______ [2]
Subtract 178 from 543.
Working:
Answer: _______ [2]
625 + 274 = _______
Working:
[2]
800 − 347 = _______
Working:
[2]
What is 150 more than 489?
Working:
Answer: _______ [2]
What is 230 less than 765?
Working:
Answer: _______ [2]
Fill in the missing number:
456 + _______ = 789
Working:
[2]
Fill in the missing number:
_______ − 268 = 432
Working:
[2]
Add 3 hundreds, 4 tens, and 7 ones to 258.
Working:
Answer: _______ [2]
Subtract 4 hundreds, 2 tens, and 5 ones from 873.
Working:
Answer: _______ [2]

Section C: Word Problems (10 marks)

Questions 17–20 carry 2–3 marks each. Read carefully, write a number equation, show your working, and write the final answer in a complete sentence.

There are 342 boys and 287 girls in a school hall. How many children are there altogether?
Number equation: ________________________
Working:
Answer: ________________________________________________________ [3]
A library has 650 books. 248 books are borrowed by students. How many books are left in the library?
Number equation: ________________________
Working:
Answer: ________________________________________________________ [3]
Muthu has 425 stickers. He gives 168 stickers to his friend. Then he buys 85 more stickers. How many stickers does Muthu have now?
Number equation: ________________________
Working:
Answer: ________________________________________________________ [3]
A baker baked 486 cookies in the morning. He baked 215 more cookies in the afternoon. He sold 372 cookies by evening. How many cookies were left unsold?
Number equation: ________________________
Working:
Answer: ________________________________________________________ [3]

End of Quiz

Answers

Primary 2 Mathematics Quiz - Addition Subtraction (Answer Key)

Total Marks: 30

Section A: Mental Calculation (6 marks)

545
Method: Add 2 hundreds to 345 → 345 + 200 = 545.
380
Method: Subtract 3 hundreds from 680 → 680 − 300 = 380.
480
Method: Add 3 tens to 450 → 450 + 30 = 480.
670
Method: Subtract 5 tens from 720 → 720 − 50 = 670.
243
Method: Add 9 ones to 234. Think: 234 + 6 = 240, then +3 = 243. Or 234 + 10 = 244, then −1 = 243.
552
Method: Subtract 8 ones from 560. Think: 560 − 10 = 550, then +2 = 552. Or count back 8 from 560.

Section B: Addition and Subtraction Within 1000 (14 marks)

598 [2]
Working:
```
  246
+ 352
-----
  598
```
Steps:
- Ones: 6 + 2 = 8
- Tens: 4 + 5 = 9
- Hundreds: 2 + 3 = 5
  No regrouping needed.
  Marking: 1 mark for correct working (column alignment), 1 mark for correct answer.
365 [2]
Working:
```
  543
− 178
-----
  365
```
Steps:
- Ones: 3 − 8 → regroup 1 ten from tens column → 13 − 8 = 5 (tens become 3)
- Tens: 3 − 7 → regroup 1 hundred from hundreds column → 13 − 7 = 6 (hundreds become 4)
- Hundreds: 4 − 1 = 3
  Marking: 1 mark for correct regrouping shown, 1 mark for correct answer.
899 [2]
Working:
```
  625
+ 274
-----
  899
```
Steps:
- Ones: 5 + 4 = 9
- Tens: 2 + 7 = 9
- Hundreds: 6 + 2 = 8
  No regrouping needed.
  Marking: 1 mark for correct working, 1 mark for correct answer.
453 [2]
Working:
```
  800
− 347
-----
  453
```
Steps:
- Ones: 0 − 7 → regroup from tens, but tens is 0 → regroup from hundreds: 800 = 7 hundreds, 9 tens, 10 ones
- Ones: 10 − 7 = 3
- Tens: 9 − 4 = 5
- Hundreds: 7 − 3 = 4
  Common mistake: Forgetting to regroup across zeros.
  Marking: 1 mark for correct regrouping across zeros, 1 mark for correct answer.
639 [2]
Working:
489 + 150 = 639
Method: Add 1 hundred → 589, add 5 tens → 639.
Or column method:
```
  489
+ 150
-----
  639
```
Marking: 1 mark for method/working, 1 mark for correct answer.
535 [2]
Working:
765 − 230 = 535
Method: Subtract 2 hundreds → 565, subtract 3 tens → 535.
Or column method:
```
  765
− 230
-----
  535
```
Marking: 1 mark for method/working, 1 mark for correct answer.
333 [2]
Working:
789 − 456 = 333
Method: To find the missing addend, subtract the known addend from the sum.
```
  789
− 456
-----
  333
```
Check: 456 + 333 = 789 ✓
Marking: 1 mark for correct operation (subtraction), 1 mark for correct answer.
700 [2]
Working:
432 + 268 = 700
Method: To find the missing minuend, add the subtrahend to the difference.
```
  432
+ 268
-----
  700
```
Steps:
- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 3 + 6 + 1 = 10 → write 0, carry 1
- Hundreds: 4 + 2 + 1 = 7
  Check: 700 − 268 = 432 ✓
  Marking: 1 mark for correct operation (addition), 1 mark for correct answer with regrouping shown.
595 [2]
Working:
3 hundreds 4 tens 7 ones = 347
258 + 347 = 595
```
  258
+ 347
-----
  595
```
Steps:
- Ones: 8 + 7 = 15 → write 5, carry 1
- Tens: 5 + 4 + 1 = 10 → write 0, carry 1
- Hundreds: 2 + 3 + 1 = 6
  Wait: 2 + 3 + 1 = 6, so answer is 605? Let's recalculate: 258 + 347.
  8+7=15 (carry 1), 5+4+1=10 (carry 1), 2+3+1=6 → 605.
  Correction: The correct answer is 605.
  Marking: 1 mark for converting "3 hundreds 4 tens 7 ones" to 347, 1 mark for correct addition with regrouping.
448 [2]
Working:
4 hundreds 2 tens 5 ones = 425
873 − 425 = 448
```
  873
− 425
-----
  448
```
Steps:
- Ones: 3 − 5 → regroup → 13 − 5 = 8 (tens become 6)
- Tens: 6 − 2 = 4
- Hundreds: 8 − 4 = 4
  Marking: 1 mark for converting place value description to 425, 1 mark for correct subtraction with regrouping.

Section C: Word Problems (10 marks)

629 children [3]
Number equation: 342 + 287 = 629
Working:
```
  342
+ 287
-----
  629
```
Steps:
- Ones: 2 + 7 = 9
- Tens: 4 + 8 = 12 → write 2, carry 1
- Hundreds: 3 + 2 + 1 = 6
  Answer: There are 629 children altogether.
  Marking: 1 mark for correct number equation, 1 mark for correct working, 1 mark for correct answer with unit ("children").
402 books [3]
Number equation: 650 − 248 = 402
Working:
```
  650
− 248
-----
  402
```
Steps:
- Ones: 0 − 8 → regroup from tens (5→4, ones become 10) → 10 − 8 = 2
- Tens: 4 − 4 = 0
- Hundreds: 6 − 2 = 4
  Answer: There are 402 books left in the library.
  Marking: 1 mark for correct number equation, 1 mark for correct working with regrouping, 1 mark for correct answer with unit ("books").
342 stickers [3]
Number equation: 425 − 168 + 85 = 342
Working:
Step 1: 425 − 168 = 257
```
  425
− 168
-----
  257
```
Step 2: 257 + 85 = 342
```
  257
+  85
-----
  342
```
Alternative (combined): 425 + 85 = 510, then 510 − 168 = 342.
Answer: Muthu has 342 stickers now.
Marking: 1 mark for correct number equation (showing both operations), 1 mark for correct step-by-step working, 1 mark for correct answer with unit ("stickers").
329 cookies [3]
Number equation: 486 + 215 − 372 = 329
Working:
Step 1: 486 + 215 = 701
```
  486
+ 215
-----
  701
```
Step 2: 701 − 372 = 329
```
  701
− 372
-----
  329
```
Steps for subtraction:
- Ones: 1 − 2 → regroup from tens (0→9 after borrowing from hundreds, 7→6, tens become 10, then lend to ones → 9, ones become 11) → 11 − 2 = 9
- Tens: 9 − 7 = 2
- Hundreds: 6 − 3 = 3
  Answer: 329 cookies were left unsold.
  Marking: 1 mark for correct number equation (showing both operations), 1 mark for correct step-by-step working with regrouping across zeros, 1 mark for correct answer with unit ("cookies").

Total: 30 marks

Note to markers: Award method marks even if final answer is incorrect, provided the working shows understanding of the algorithm. For word problems, the number equation must match the problem context (correct operation choice).