Percentage (Practice 1) - Qn 32 - 46

These answers are taken from Tan Zi Hua (6F). Thanks to her for her neat and accurate workings.

Revision Paper (Term 1) - Booklet B

(Thanks to Lee Xin Yee (6D) for the neat and systematic answers)

Qn 16 - 17




Qn 18 - 19

Qn 20 - 22

Qn 23 24

Qn 25

Qn 28-19

Qn 30

Qn 31 - 33 ( no need to do corrections)

Qn 34 - 35

No. of Groups No of children in each group Total (must be 36)

1 36 (not in the ans as should be more than 1 gp)

2 18 (Yes)

3 12 (Yes)

4 9 (Yes)

6 6 (Yes)

9 4 (Yes)

12 3 (Yes)

18 2 (Yes)

36 1 (not in the ans as should be fewer than 36 grps)

Hence, the total no. of way = 7 ways

Qn 37 - 38

Men - 4 units

women - 5 units

Women 5 5

--------- = ____ = _____

Guests 4+5 9

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Qn 39

Qn 40

Qn 41

Book cost $5.50 more than a file.

File - 1 unit

Book - 1 unit + 5.50

1 book and 4 files

Book - 1 unit + 5.50

4 files - 4 units

Total : 5 units + 5.50 = 13

5 units = 13- 5.50 = 7.50

1 unit = 7.50 ÷ 5 = 1.50

File = 1 unit ===> $1.50

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Qn 42

Monday - sold 3/5

Total muffins made - 5 units

________________________________

<-----Mon-----------------> <-----Left------>

Tuesday - 1/4 of the remainder

-> remainder is 2 units.

-> cut each unit into half

-> do the same for the other 3 units

-> Hence, Tuesday : 1 part.

Monday - more than tues by 250

- Monday : 6 parts

- Tuesday : 1 part

Monday more by 5 parts => 250

1 part => 250 ÷ 5 = 50

left : 3 parts => 50 x 3 = 150 muffins

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Qn 43

Last Year

Boys : 1 unit

Girls : 2 units

TOTAL : 3 units

This year

Boys : 1 unit x 4 times = 4 units

Girls : 2 units x 3 times = 6 units

Total : 4 + 6 = 10 units

10 units - 3 units = 7 units (joined)

7 units => 70

1 unit => 10

3 units => 10 x 3 = 30 members (last year)

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Qn 44

Joel and Simon had the same amt of money. After Simon gave to Joel, note that the total still remains the same.

Hence, the total for before and after model is the same.

Before (EACH HAS THE SAME)

Joel : 26 ÷ 2 = 13 units

Simon : 26 ÷ 2 = 13 units

(Total : 26 units)

After

Joel : 8 units x 2 = 16 units

Simon : 5 units x 2 = 10 units

(note : 13 units cannot be divided into 2, will change the total to 26 units)

Total : 13 units x 2 = 26 units

Joel : 16 units - 13 units = 3 units (extra - received from Simon)

3 units = $15

1 unit = $15 ÷ 3 = $5

(Joel) 16 units = $5 x 16 = $80

==================================

Qn 45 -50

- I will explain in class :)

SA1 Practice 1 (Booklet A)

Qn 1 & Qn 2















(3)






(4)





















Qn 3 and 4
























































Qn 5 and 6




































































Qn 7 and 8





















































Qn 9















































Qn 10















































Qn 11


















































Qn 12


















































Qn 13 - The question is wrong. It should be "decrease" instead of increase.








Qn 14

(3)

Qn 15

Qn 16 and 17

Qn 18

Qn 19 and 20

Qn 21

Solution:

7u -> $ 70y

1 u -> $10y

12u -> $10y x 12 = $120y

Qn 22 and 23

Qn 24

Qn 25

Solution

Amt to be paid

At 2.45 pm -> $2

At 3.15 pm -> $2 + 1.50 =3.50

At 3.45 pm -> $3.50 + 1.50 = $5

At 4.15 pm -> $5.00 + 1.50 = $6.50

Time left carpark : 4.15 pm

Qn 26 and 27

Qn 28

Qn 29

Qn 30

Qn 31

Qn 32

Qn 33

Qn 34

Qn 35

Announcement for 6D and 6F pupils

Dear pupils,

It is ok if you can't finish the corrections. I am trying my best to upload the solutions.

Just do corrections for whatever I have uploaded.

In the meantime, you can attempt the SA1 practice (Booklet B)

Sorry to keep you waiting. :)

Mdm Goh.