Primary 5 Mathematics Practice Paper 2

TuitionGoWhere Practice Paper — Mathematics Primary 5

Answer Key — Whole Numbers (Version 2 of 5)

Section A: Multiple Choice

1. D [2]
The digit 7 is in the hundred thousands place in 3 725 408.
Value = 7 × 100 000 = 700 000.
Common mistake: Choosing B (700) — confusing the hundreds place with the hundred thousands place.

2. B [2]
Six million = 6 000 000
Three hundred and four thousand = 304 000
Fifty = 50
Combined: 6 304 050.
Common mistake: Choosing A — writing 340 instead of 304 (mixing up hundreds of thousands and tens of thousands).

3. C [2]
4 567 892 — the digit in the hundred thousands place is 5, and the next digit (ten thousands) is 6, which is ≥ 5, so we round up.
4 567 892 → 4 600 000.
Common mistake: Choosing A — rounding down instead of up.

4. B [2]
8 × 1 000 000 = 8 000 000
5 × 10 000 = 50 000
3 × 100 = 300
2 × 1 = 2
Sum = 8 000 000 + 50 000 + 300 + 2 = 8 050 302.
Common mistake: Choosing A — omitting the millions place entirely.

5. B [2]
Comparing:
A = 5 999 999
B = 6 000 001
C = 5 990 999
D = 6 000 000
The greatest is 6 000 001 (B).
Common mistake: Choosing A — thinking 5 999 999 is close to 6 million and therefore the largest.

Section B: Short Answer

6. 9 206 415 [1]
Nine million = 9 000 000; two hundred and six thousand = 206 000; four hundred and fifteen = 415.
Full credit only if written correctly with proper place value. Award 0 if commas or spacing cause ambiguity.

7. Seven million, eighty-three thousand and six [1]
7 000 000 + 80 000 + 3 000 + 6 = 7 083 006.
Note: "and" is used before the last group (ones). Accept "seven million eighty-three thousand six" without "and" for 1 mark.

8. 3 004 500, 3 045 000, 3 405 000, 3 450 000 [2]
Award 2 marks for all four in correct order. Award 1 mark if two or more are correctly positioned but the full sequence is wrong.

9. 2 700 000, 2 900 000 [2]
The pattern increases by 200 000 each time.
2 500 000 + 200 000 = 2 700 000
2 700 000 + 200 000 = 2 900 000
Award 1 mark for one correct answer.

10. 5 [1]
For 4 □67 820 to be between 4 500 000 and 4 600 000, the digit in the hundred thousands place must be 5 (giving 4 567 820).
If □ = 4, the number is 4 467 820 < 4 500 000. If □ = 6, the number is 4 667 820 > 4 600 000.

11. 6 000 100 pens [2]
Working:
   3 285 600

• 2 714 500
  = 6 000 100
  Award 1 mark for correct addition even if unit ("pens") is missing. Award 0 if no working is shown and answer is wrong.

12. 1 625 000 books [2]
Working:
   1 250 000
+    375 000
= 1 625 000
Award 1 mark for correct addition. Award 0 if no working and answer is wrong.

13. 670 000 [2]
Working:
   4 560 000
− 3 890 000
=    670 000
Award 1 mark for correct subtraction. Accept without unit.

Section C: Structured / Problem Solving

14.
(a) Science Museum [1]
Comparing: 3 125 800 > 2 760 400 > 2 340 500 > 1 987 600.

(b) 3 100 000 [1]
3 125 800 — the ten thousands digit is 2 (< 5), so round down to 3 100 000.
Common mistake: Writing 3 126 000 (rounding to nearest thousand instead).

(c) 10 214 300 visitors [2]
Working:
       2 340 500
       3 125 800
       1 987 600
+      2 760 400
= 10 214 300
Award 1 mark for correct addition even if final answer has a minor arithmetic slip. Award 0 if no working shown.

15.
(a) 625 000 books [2]
Working: 5 000 000 ÷ 8 = 625 000
Award 1 mark for correct division. Award 0 if no working and answer is wrong.

(b) 0 books [1]
5 000 000 ÷ 8 = 625 000 remainder 0.
8 × 625 000 = 5 000 000 exactly.

16.
(a) 0, 1, 2, 3, 4 [2]
For 6 □24 785 to round to 6 000 000 (nearest million), the hundred thousands digit must be less than 5.
So □ can be 0, 1, 2, 3, or 4.
Award 1 mark for listing at least three correct values. Award 2 marks for all five.

(b) 6 424 785 [1]
The largest possible value occurs when □ = 4: 6 424 785.

17.
(a) **$224 250** [2] Working:$128 500 + $95 750 =$224 250
Award 1 mark for correct addition. Award 0 if no working and answer is wrong.

(b) **$552 750** [2] Working: Class 5A =$128 500
Class 5B = $224 250 Class 5C =$200 000
Total = $128 500 +$224 250 + $200 000 =$552 750
Award 1 mark for adding two classes correctly. Award 2 marks for full correct answer with working.

Total: 40 marks