Answer for Review 4 Page 39 - 48

Page 39

1a) 864 (1b) 0.9
1c) 108.63 (1d) 40.05
1e) 405 (1f) 347.05
1g) 30 (1h) 657

2a) 10 (2b) 0.07
2c) 10 (2d) 84.1

3a) 970 (3b) 7396
3c) 0.3 (3d) 3010
3e) 9340 (3f) 4
3g) 4115 (3h) 67200

Page 40
4a) 4340 (4b) 23.4
4c) 2422 (4c) 1155
4e) 14000 (4f) 230400
4g) 48 (4h) 875

5)
As long as your decimals met the requirements, it is a correct answer
Examples:
1 decimal place: 0.1
2 decimal places: 0.45
3 decimal places: 0.147

6a) 3.7 (6b) 0.075
6c) 3.67 (6d) 15.62
6e) 0.98 (6f) 15.2
6g) 0.15 (6h) 0.64

Page 41
7a) 100 (7b) 1000
7c) 100 (7d) 1000
7e) 0.4 (7f) 0.006
7g) 0.105 (7h) 10.14

8)
5kg = 5000g
5000 / 200 = 25
Ans: 25days

9)
cost of 100kg of rice - $1.35 x 100 = $135
cost of 20kg of flour - $1.26 x 20 = $25.20
$135 + $25.20 = $160.20
ans: $160.20

Page 42
10)
Total leaflets printed - 28 x 3000 = 84000
Leaflets per box - 84000 / 40 = 2100
ans: 2100leaflets

11)
$3.50 x 50 = $175
$4 x 34 = $136
Total - $175 + $136 = $311
ans: $311

Page 43
12a) 90 (12b) 125
12c) 7.8 (12d) 2m 7cm
12e) 60m 80cm (12f) 72m 62cm
12g) 8500m (12h) 902m
12i) 1240m (12j) 3km 7m
12k) 20km 760m

(answer with no units are considered wrong)
12l) 153cm
12m) 3m 8cm
12n) 8418000m
12o) 1km 56m
12p) 42km 195m

13a) 9080g (13b) 215300g
13c) 138g (13d) 2kg 900g
13e) 73kg 20g (13f) 85kg 560g
13g) 4000ml (13h) 9250ml
13i) 8ml (13j) 9l 30ml
13k) 1l4ml (13l) 215l 600ml

14)
An apple - 0.15kg = 150g
A wooden desk - 17.24kg = 17240g
A sheet of paper - 0.07kg = 70g
3 assessment book - 4.75kg = 4750g

(answer with no units are considered wrong)
15a) 2300ml
15b) 1864l 500ml

Page 45
16a) 30m (16b) 0.47m
16c) 0.04m (16d) 2.07m
16e) 34.5m (16f) 97.68m
16g) 0.03km (16h) 3.009km
16i) 20.85km (16j) 6.045km
16k) 2.002km (16l) 90.07km

(answer with no units are considered wrong)
17a) 0.84m
17b) 5.5m
17c) 0.508km
17d) 22.84km

18a) 0.036kg (18b) 12.7kg
18c) 0.04kg (18d) 6.002kg
18e) 505.5kg (18f) 7.12kg

Page 46
19a) 25.5 (19b) 0.61
19c) 5.283 (19d) 1.7
19e) 21.03 (19f) 62.09

(answer with no units are considered wrong)
20a) 2.764kg
20b) 610.3kg
20c) 3.06kg
20d) 5.513l
20e) 6.05l
20f) 11.05l

Page 47
(answer with no units are considered wrong)
21)
3m 15cm = 315cm
315 / 9 = 35
35cm = 0.35m
ans: 0.35m

22)
5kg 250g = 5.25kg
2800g = 2.8kg
10.45kg + 2.8kg + 5.25kg = 18.5kg
ans: 18.5kg

Page 48
(answer with no units are considered wrong)
23)
Distance from point B to point C = 350m x 2 = 700m
1230m - 350m - 700m = 180m
ans: 180m from point c to point D

24)
22863 - 610.5 = 22252.5
22252.5 + 22863 = 45115.5l
0.5l x 1000 = 500ml
ans: 45115l 500ml

Please do circle questions with difficulties and we can discuss it on Wednesday!
Happy learning!