This document contains the answer key for a practice paper with 45 questions across 3 sections (A, B, C). Section A contains 20 multiple choice questions worth 2 marks each. Section B contains 20 short answer questions worth 2-4 marks each involving calculations. Section C contains 5 multi-step word problems worth 4 marks each involving converting between units and calculating totals.

1. Answer Key
Practice Paper 7
Section A (2 marks each)
1. 4 6. 2 11. 1 16. 2
2. 2 7. 4 12. 4 17. 3
3. 1 8. 4 13. 1 18. 3
4. 3 9. 3 14. 2 19. 3
5. 2 10. 2 15. 3 20. 2
Section B (2 marks each)
Answer Mark Allocation
21 6 280
22 4 433 8 105 – 3 672
23 6 517 x 7 = 3 619
24 1 kg 270 g
25 60 5 x 12
26 $18.30 15 + 2.50 + 0.80
27 1.35
28 201
29 5 4+ 3 + 8 = 15
15 – 8 – 2
30 123 1 000 – 262 = 738
738 ÷
31 9 6 x 6 = 36
36 ÷ 4
32 5 15 ÷ 3
33 2 h 20 min 1 h 45 min + 35 min
1

2. 34 7 1 1
1- -
6 4
12
35 (a)
(b)
36 75 250 – 25 = 225
225 ÷ 3
37 16, 10
38 Monday, Wednesday
39 295 220 + 75
40 2 466 1 000 + 1 200 + 266 Or
1 000 + 1 200 = 2 200
2 200 + 266
2

3. Section C (4 marks each)
Deduct ½ m for missing standard and non-standard unit.
41. 634 + 285 = 919
634 + 919 + 1 217 = 2 770 OR 634 + 919 = 1553
1 553 + 1 217 = 2 770
There were 2 770 people altogether.
42. 442 – 46 = 396
396 x 3 = 1 188
She has 1 188 red balls.
43. 3 units 78
1 unit 78 ÷ 3 = 26
26 x 10 = 260
He had $260 at first.
44. (a) 10 x 5 = 50
50 + 14 = 64
She works 64 h a week.
(b) 64 x 9 = 576
She is paid $576 in a week.
45. No. of 3 No. of 2  Total no. of bottles Total Capacity √/x
 bottles bottles (80  )
15 15 30 45 + 30 = 75 x
17 13 30 51 + 26 = 77 x
19 11 30 57 + 22 = 79 x
20 10 30 60 + 20 = 80 √
He had 20 3-litre bottles.
Or
Assume all are 2-litre bottles,
30 x 2 = 60
80 – 60 = 20
3

4. so, there are 20 3-litre bottles.
30 – 20 = 10 (2-litre bottles)
To check,
10 x 2  = 20 
20 x 3  = 60 
20  + 60  = 80 
There are 20 3-litre bottles.
4