# data[].attributes.body
(a): 9-1=8

8➕8➕8➕9=33

(b): 198➗33=6

6x4=24

(a) Ans:33cm

(b) Ans:24

# data[].attributes.body
Individual Work - Spend 5 min to review this question;

Pair Work - Spend another 5 min to solve this question;

Class discussion - 5 min

# data[].attributes.body
11u=165

1u=165/11=15

10u=15 X 10=150

150 X 2=300cm2(ans)

# data[].attributes.body
3 out of 5=12 out of 20(top)

2 out of 4=10 out of 20(bottom)

12+10=22

20+20=40

165cm2/22=7.5cm²

40x7.5cm2=300cm2

Ans: 300cm2

# data[].attributes.body
s

Small unit:big unit

4. : 5

4x3=12

5x2=10

12+10=22

165/22=7.5

7.5x40=300

Ans:300cm2

# data[].attributes.body
3/5=12/20

2/4=10/20

22u=165

1u=165/22=7.5

7.5x40=300

Ans=300cm2

# data[].attributes.body
2/3x108=72

72/3=24

24x0.5=12

108-72-12=24

240/0.20=120

120+72+24=216

Ans : 216

# data[].attributes.attachment_caption
For part a, my first step was to find 4 rings without connecting which is 9x4=36.                                                     After that, I found the length of the overlapping parts which is                   6x1=6.                                                      Lastly, I found the length of 4 rings with connecting which was              36-6=30                               A.)30cm     For part b, I found the length of the top ring and bottom ring overlapping which was.                                           9-1=8.    (Pls look at the photo for the solution to part b)

# data[].attributes.body
Individual Work - Spend 5 min to review this question;

Pair Work - Spend another 5 min to solve this question;

Class discussion - 5 min

# data[].attributes.body
22u=165

1u = 165/22=7.5

Area of the square = 300cm2

Ans 300cm2

# data[].attributes.body
Ans:135

# data[].attributes.body
A) 9+7+7+7=30

Ans (a :30cm

B)198-9=189

189/7=27

27+1=28

Ans b :28 rings

# data[].attributes.body
5 parts- Shaded : unshaded : total

3. : 2 : 5

4 parts- Shaded : unshaded : total

# data[].attributes.body
3/5x4=12/20

2/4x5=10/20

22u:165

1u:165/22=7.5

40u:7.5x40=300

ans:300cm2

# data[].attributes.body
8x4+1=33

A) ans : 33cm

198/33=6

6x4=24

B) ans : 24

# data[].attributes.body
(A)

9cm-1cm=8 cm

9cm-2cm=7 cm

7cm+7cm+8cm+8cm=30 cm

Answer a: 30cm

(B)

198cm-8cm-8cm=182 cm

182cm/7cm=26 (sets of rig between first and last)

26+2=28

Answer b: 28

# data[].attributes.body
A) 10-1=9

9x4=36

1x3=3

36-3=33

ANS A):33

B) 33/4=8.25

198/8.25=24

Ans B):24

# data[].attributes.body
Individual Work - Spend 5 min to review this question;

Pair Work - Spend another 5 min to solve this question;

Class discussion - 5 min

# data[].attributes.body
2020 PSLE Paper 2 Q15

distance from 1st to 4th ring : 9cm+9cm+9cm+9cm-1cm-1cm-1cm=33 cm

33cm/4=8.25 cm

198cm/8.25cm=24

Ans : (a)33cm

(b)24

# data[].attributes.body
solve by ratio

1 Small unit :1 Big unit

4. : 5

4+4+4+5+5=22

165/22=7.5

7.5x40=300

Ans:300cm2

# data[].attributes.body
a)

9-1-1=7

9+7+7+7=30

Ans30cm

b)

198-9=189

189/7=27

27+1=28

Ans28

# data[].attributes.body
A) diameter of circle=9cm

9+9+9+9=36

36-3=33

Ans (a): 33cm

B) 198-2=196

9-2=7

196/7=28

Ans (b): 28

# data[].attributes.body
a) circumference of i side unshaded: 1/4x3.14x15=11.775

2 side: 11.775x2=23.55

b) area triangle. 1/2x7.5x7.5=28.125

area of quarter circle. :

1/4x3.14x7.5x7.5=44.15625

half lezf : 44.15625-28.125=16.031325

full leaf: 16.03125x2=32.0625

area of 1 circle: 3.14x7.5x7.5=176.625

2 circle : 176.625x2=353.25

353.25-32.0625=321.1875

# data[].attributes.body
a) 9-1-1= 7 (overlapped ring)

7x3=21 (3 overlapped rings)

21+9(non overlapped ring at the top)=30

b) 198-9=189

189 divided by 7 = 27

27 +1 =28

ans:

a) 30cm

b) 28 rings

# data[].attributes.body
A)9+8+8+8=33

The answer is 33cm

B）198/33=6

6x4=24

The answer is 24

🐐🐐🐐

# data[].attributes.body
Top =

3/5

Bottom

1/2

Common denominator =20

3/5=12/20

2/4=10/20

10/20+12/20=22/40=11/20

11/20 / 165=1/300

1cm2 =0.155 in² 1/300

300/300 =

# data[].attributes.body
Make denominator the same 3 over 5 =12 over 20 2 over 4 = 10 over 20. 22 over 40 is 165. 1over 40 is 7.5 whole square is 7.5x40=300. Ans=300cm2

# data[].attributes.body
b) my calculations were the cause of getting it wrong

# data[].attributes.body
1cm+1cm=2cm

9cm-2cm=7cm

7cmx4=28cm

28cm+2cm=30cm

Ans: a 30cm

Part b method 1

198cm-30cm=168 cm

168cm/7cm=24

24+4=28 (Ansb)

Part b method 2

198cm-2cm=196cm

196cm/7cm=28 (Ansb)

Answer a 30cm

Answer b 28

# data[].attributes.body
4x9cm=36cm

36cm-1cm-1cm-1cm=33cm

198/33=6

6x4=24

Ans(a): 33cm

Ans(b): 24

# data[].attributes.body
shaded top:3/5=12/20

Shaded bottom:2/4=10/20

Total fraction=22/40

1/40=165/22=7.5

Area of square:7.5x40=300

Ans:300cm2

# data[].attributes.body
4 Big rectangle=165

8 Big rectangle(the other half)=165x2=330 (ans)

# data[].attributes.body
2020 PSLE Paper 2

3/5x1/2=3/10

1/2x1/2=1/4

3/10=6/20

1/4=5/20

6+5=11

165=11u

1u=165/11=15

Total area=15x20=300

Ans=300cm2

# data[].attributes.body
A) I did not minus 36 by 6 ones.

B) I should minus 9 before dividing and add1 to get the answer.

# data[].attributes.body
2020 PSLE Paper 2 Question 15

(A)

Inner circle=9-1-1=7

Distance=7x4+1+1=30

Ans(A)=30cm

(B)

198-8-8=182

182/7=26

Rings=26+2=28

Ans(B)=28 rings

M2

198-2=196

196/7=28

# data[].attributes.body
15x2=30

30x3.14=94.2

94.2x2=188.4

30x3.14/4=23.55

23.55x2=47.1

188.4-47.1=141.3

A) ans : 141.3

2x15x15x3.14=1,413

15x15x3.14/4=176.625

1413-176.625x2=1,059.75

B) ans : 1059.75

# data[].attributes.body
Q15(a)

1x3=3

9x4=36

36-3=33

(a)ans:33cm

Q15(b)

4 rings=33

198/33=6

6x4=24

(b)ans:24

# data[].attributes.body
9 X 4=36

36-1-1-1=32 cm(a)

# data[].attributes.body
9x4=36

36-1-1-1=33

(A) ans:33cm

198/33=6

6x4=24

(b) ans:24

# data[].attributes.body
Question 15

A) 9cm x 4 = 36cm

1cm x 4 = 4cm

36cm - 4cm = 32cm

32cm + 1cm = 33 cm

Ans a: 33cm

B) 198cm x 33cm = 6

6 x 4 = 24

Ans b: 24

# data[].attributes.body
198/9=22

# data[].attributes.body
a)9-1=8 (length of rings without the extra spacing between each ring)

9+8+8+8=33

b) 198/33=6 (groups of 4)

6x4=24 (total amount of rings)

# data[].attributes.body
(A)= 9+(3x8)+1=34

Ans :34cm

(B)=198-22=176

176/8=22

Ans:22 rings

# data[].attributes.body
Question 15

# data[].attributes.body
a) 9+8+8+8=33

B) 198/33=6

6x4=24

Ans:a)33cm

B)24

# data[].attributes.body
(a) (9cmx4cm)-(1cmx4cm)=32cm

Ans:32cm

(b) 198/8=24cm

Ans: 24cm

# data[].attributes.body
(a) 8cm x 4 + 1 =33cm

(b) 198cm/ 33 = 6

6 x 4 =24

# data[].attributes.body
2020 PSLE Paper 2

Q12

# data[].attributes.body
Corrected: A) 47.1

(23.55x2)

# data[].attributes.body
9x4=36

36-3=33

B:

33/4=8.25

198/8.25=24

Ans:

A:33cm

B:24

# data[].attributes.body
2020 PSLE PAPER 2 QUESTION 12

# data[].attributes.body
Question 12

A) 1/4 x 2 x 3.14 x 15 = 23.55

23.55 x 2 = 47.1

Ans a: 47.1cm

B) 3.14 x 15 x 15 = 706.5

706.5 x 2 = 1,413

15 x 15 = 225

706.5 / 4 = 176.625

225 - 176.625 = 48.375

225 - (48.375 x 2) = 128.25

1413 - 128.25 = 1,284.75

Ans b: 1284.75cm2

# data[].attributes.body
Ans: a) 47.1cm

b) 1284.75cm2

# data[].attributes.body
(100% wrong)

# data[].attributes.body
By Danica

# data[].attributes.body
Cunrui paper 2 question 15 2020

# data[].attributes.body
2020 PSLE Paper 2 Q12

# data[].attributes.body
Q14

# data[].attributes.body
12(b)

radius:15

1/4x3.14x30=23.55

(b)ans:23.55cm

12(a)

1/2x15x15=112.5

3.14x1/4x15x15=176.625

64.125x2=128.25

3.14x15x15=706.5

706.5x2=1,413

1413-128.25-128.25=1,156.5

(a)ans:1156.5cm2

# data[].attributes.body
1/4x3.14x30=23.55

23.55x2=47.1

Ans(a)47.1cm

3.14x15x15=706.5

1/4x3.14x15x15=176.625

15x15=225

225-176.625=48.375

176.625-48.375=128.25

706.5x2=1,413

1413-128.25=1,284.75

(B)ans:1284.75cm2

# data[].attributes.body
I am pretty sure I am wrong

# data[].attributes.body
I think i got it wrong because i found the wrong thing i found the area of the unshaded part instead of the shaded part

# data[].attributes.body
PSLE Paper2 Q12

(A)

Square=15x15=225

225/2=112.5

1/4x3.14x15x15=176.625

Half leaf =176.625-112.5=64.125

Full leaf=64.125x2=128.25

Ans(a)=128.25

(B)

Circle=3.14x15x15=706.5

706.5x2=1,413

1413-128.25=1,284.75

Ans(B)=1284.75

# data[].attributes.body
Aurelia Q14

# data[].attributes.body
2/3x108=72

$72/1=72

72/3=24

24x$0.50=$12

$108-$72-$12=$24

$24/$0.20=120

120+72+24=216

Ans:216

# data[].attributes.body
By Danica

# data[].attributes.body
Ans: 252

wrong but I tried yay