Review 5 Page 83 - 90

Page 83
1a) 36
1b) 9

2)
(answers with no units are considered wrong)
Total - 29.1 + 37.3 + 32.6 + 40.8 = 139.8
Average - 139.8 / 4 = 34.95
ans: 34.95kg

3)
(answers with no units are considered wrong)
Total - 76.20 + 88.50 + 56.30 + 90.50 + 66.60 = $378.10
Average - 378.10 / 5 = 75.62
ans: $75.62

4)
(answers with no units are considered wrong)
Average - 645.7 / 8 (round off) 80.7l
ans: 80.7l

5)
(answers with no units are considered wrong)
Perimeter - 14.8 x 4 = 59.2m

6)
(answers with no units are considered wrong)
Parcel B - 26.4 + 32.3 = 58.7
Parcel C - 26.4 - 13.4 = 13.0
Total - 26.4 + 58.7 + 13.0 = 98.1kg
Average - 98.1 / 3 = 32.7kg

Page 85
7)
Total Score - 92 x 4 = 368
368 - 78 - 95 - 88 = 107
ans: Team D scored 107points

8)
(answers with no units are considered wrong)
Total height of 2 children - 1.45m x 2 = 2.9m
Total height of other 3 children - 1.62 x 3 = 4.86m
Total height of 5 children - 2.9m + 4.86m = 7.76m
ans: 7.76m

Page 86
9)
Total number of pins = 248 x 2 = 496
4 units - 496
1 unit - 496 / 4 = 124
3 units - 124 x 3 = 372
Swee wei has 372pins
Kenneth has 124 pins

10a) 28%
10b) 72%

11a) 67
11b) 9/100
11c) 9/50
11d) 13/25

Page 87
12a) 47 (12b) 70
12c) 10 (12d) 77
12e) 7 (12f) 70

13)
57 out of 100
As fraction: 57/100
As percentage: 57% (must have units)
As decimal: 0.57

3 out of 10
As fraction: 3/10
As percentage: 30% (must have units)
As decimal: 0.3

14a) 44%
14b) 90%
14c) 51%
14d) 36%

15a) 65%
15b) 64%

Page 88
16)
100% - 82% = 18%
100% - 950
1% - 9.5
18% - 9.5 x 18 = 171
ans: 171 seats

17)
100% - 30% - 28% = 42%
100% - $50
1% - $0.5
42% - 42 x $0.5 = $21
ans: $21 (no units considered as wrong answer)

Page 89
18)
100% - 10% = 90%
2/3 of 90%
-> 2/3 x 90%
= 60%

ans: 60% (no units considered as wrong answer)

19)
GST paid - 7% of $860
-> 7% x $860
= $60.20
Total paid -> $860 + $60.20 = $920.20

Page 90
20)
Discount -> 35% of $725.60
-> 35% x $725.60
= $253.96

Amount paid - $725.60 - $253.96 = $471.64
ans: $471.64 (no units considered as wrong answer)

21)
100% - 15% = 85%
selling price - 85% x $4505 = $3829.25
down payment - 4% x $3829.25 = $153.17
ans: $153.17 (no units considered as wrong answer)

Take note of questions which needs to be discussed on Wednesday!
Happy learning!