Macalunas, Nahla H.
BSA 3
A. Perform the indicated operations. Simplify answers:
5
3
5∗3
15
𝟏
1) (9) . (10)= 9∗10 = 90 = 𝟔
7
5
2) (3 8). (6)=
24+7
5
∗6=
8
3
2
3) 5 ÷ (3)= 5 ∗ 2 =
2
4) (6 5) ÷20=
3
9
5) (2 5) + 10=
1
6∗5+2
5∗20
10+3
5
5
5∗3
2
10
3
2
3
17
3
75
8) 98 - 53 = 8 −
3
5
∗6=
15
31∗5
5∗6
𝟏
=
155
48
𝟏𝟏
= 𝟑 𝟒𝟖
= 𝟕𝟐
2
32
𝟖
= 100 = 𝟐𝟓
9
+ 10 =
1
1
8
=
6) (5 4) + (3 8) - (2 2)=
7) 10 - 3 =10 −
31
=
=
30
3
225
24
13
5
24
4
−
−
9
29
+
10
26
9
35
𝟏
+ 10 = 10 + 10 = 10 = 𝟑 𝟐
8
=
3
136
24
5
−2=
20
=𝟔
3
89
42
8
𝟐
+
29
8
5
−2=
71
8
5
−2=
71
8
−
20
8
=
51
8
𝟑
= 𝟔𝟖
𝟑
𝟏𝟕
= 24 = 𝟑 𝟐𝟒
B. Show your neat solution to each of the following problems.
1) Macy thought that a plane journey would take 7/10 hour but the actual journey to
⅕ hour longer. How long did the actual journey take? 9/10 or 0.90 hour
7 1
7
2
9
+ =
+
=
10 5 10 10 10
2) Gary took ⅔ hour to paint a portrait. This was ⅓ hour shorter than the time he took
to paint scenery. How long did he take to paint scenery? 1hour
2 1 3
+ = =1
3 3 3
2
3) A crew is made up of 8 men; the rest are women. 66 3 % 𝑜𝑓 𝑡ℎ𝑒 𝑐𝑟𝑒𝑤 𝑎𝑟𝑒 𝑚𝑒𝑛. How
many people are in the crew? 12 crews
2
200
8
8 ÷ 66 % = 8 ÷
= 3 = 𝟏𝟐
3
3
2
Macalunas, Nahla H.
BSA 3
4) At a sale, shirts were sold at 315 each. This price was 85% of their original price.
What was the original price? 370.5 each shirt
315 ÷ (85% ∗ 100) = 315 ÷ 0.85 = 𝟑𝟕𝟎. 𝟓
5) There are 32 students in a class. 9 of those students are women. What percent are
men? (you may round off answer to the nearest tenth) 71.8%
32 − 9 = 23 ÷ 32 = 0.71875 ∗ 100 = 𝟕𝟏. 𝟖%
6) The Royals softball team played 75 games and won 55 of them. What percent of the
game did they lose? (you may round off answer to the nearest tenth) 26.7%
75 − 55 = 20 ÷ 75 = 0.2667 ∗ 100 = 𝟐𝟔. 𝟕%