Ans for Practice Paper 9

Dear all, Hope you have done the two practice papers. Practice Paper 9 No Answer 1. 4 2. 2 3. 2 4. 3 5. 2 6. 4 7. 3 8. 4 9. 4 10. 1 11. 4 12. 3 13. 1 14. 2 15. 1 16 365 17 0.56 18 (7n – 12) kg 19 2/3 20 $30 21 7 marbles 22 20 cm 23 (49 pi – 98)cm2 24 1/2 25 6 cm 26 116 27 1/2 x 50 = 25 60 – 50 = 10 25 ÷ 10 = 2.5 2.5h after 0845 is 1115. 28 60 x 4 = 240 1/3x 240 = 80 24/80 x 100% = 30% 29 20% ---- 360 100% ---- 1800 30% ----- 1800 100% ----- 6000 30 90o – 30o = 60o Since, triangle ABC is an equilateral triangle. BC = 20 cm 31 540 – (68 + 73) = 399 399 ÷ 5 = 79 R 4 32 6 x y = 6y 33 10 packets of fries ------ 4 pies 10 – 5 = 5 (left) 5 packets ------ 2 pies 5 – 2 = 3 3 pies ----- $10.50 1 pie ------ $3.50 4 pies ------ $14 34 7 units ---- 150 – 45 = 105 1 unit ---- 105 ÷ 7 = 15 35 18 +12 = 30 1u = 30 2u = 60 36 15 units – 10 units = 5 units 5 units ------ 25 or 25 ÷ 5 = 5 1 unit ------ 5 11 units ------ 55 37 0.65 x 2700 = 1755 0.07 x 1755 = 122.85 (a) $122.85 (b) 1.07 x 1755 = 1877.85 Or 1755 + 122.85 = 1877.85 (b) $1877.85 38 1h ------ 15 km 4h ------ 60 km 3u = 60 km + 360 km = 420 km 1u = 140 km 2u = 280 km 280 ÷ 4 = 70 Ans: 70 km/h 39 (a) 1 : 1 [Common base (AE) and height (CD)] (b) 24u = 12 cm 11u = 5.5 cm 40 C : G 7 : 3 = 28 : 12 C : G 6 : 4 = 18 : 12 40u = 480 or 480 ÷ 40 = 12 1u = 12 10u = 120 or 12 x 10 = 120 Or 30% x 480 = 144 70% x 480 = 336 40% ------- 144 10% ------- 36 60% ------- 216 336 – 216 = 120 41. 5 x 3 = 15 15 + 9 = 24 2u ------ 24 1u ----- 24 ÷ 2 = 12 6u ----- 12 x 6 = 72 72 + 5 = 77 42 450 – 208 = 242 3S + 1A = 242 – (1) 5S + 4A = 450 – (2) (1) x 4, 12S + 4A = 968 – (3) (3) – (2), 7S = 518 1S = 518 ÷ 7 = 74 5S = 74 x 5 = 370 43. 40 44. 8 : 37 45a. 5cm 45b. 468.69 cm2 46a. 36 46b. 77 47a. 8 47b. 28 48a. 16 48b. 576

8 July - Math

Dear all,
Sorry for the late post. I was very sickly on Sat and Sun - Fever, sore throat and runny nose. Still not feeling well- nose still runny.

For rate,  it is very easy. Look at Pg 123 of your WB, Q7

the rate of flow is 3 litres per minute. What does that mean?
 It means 1min -----  3 litres. So to find the time, you will need to find the volume first.

(7b)  volume -- (10 x 20 x 30) cubic cm = 6000 cubic cm
                                                                = 6 litres

 3 litres ------ 1 min
6 litres ------- 2 min.

Pg 131. You have two taps filling in the water, so find out in 1 min how much water is filled. How?

Tap A :  1 min ----- 3 litres
Tap B :  1 min ----- 2 litres

so for Tap A and Tap B : 1 min ---- (3 + 2 ) litres = 5 litres

Once you are clear of this, to find how time, what do you need? Yes, Volume of water.

Volume of water in the tank when it is half-filled
= (40 x 20 x 50 x 1/2 ) cubic cm
= (20 000) cubic cm
= 20 litres

5 litres ------- 1 min
20 litres ------ 4 min

Pg 132. Now you have one tap filling in water and the other draining out water, so how? Simple, apply the same concept.

Tap A : 1 min ---- 6 litres
Tap B : 1 min ---- 4 litres

Tap A and Tap B : 1 min ---- (6 - 4 ) litres = 2 litres

Once you get this relationship right, the rest will be mechanical.
So, what to find now?
Yes, the volume in the tank.

Volume = L x B x H
              = (20 x 10 x 30)
              = 6000 cubic cm
              = 6 litres

2 litres ------ 1 min
6 litres ------ 3 min.

See, rate in volume is SO easy right?

Please finish up your volume WB and complete your Revision 2 and also the practice paper that was given to you. For Practice Paper 1, make sure you go through the corrections on your own first.  Remember to log on to learnlogy for volume exercise.

We are left with 11 weeks.....  :(

Jia You!!!

Regards,
Mrs Mak

24 June - 26 June - E learning

Dear all,
Please be informed that the Supplemsentary classes for next week, 24 June to 26 June will be cancelled due tot he worsening haze. In place of the classes, we will be having e-learning instead.

Please log in to mconline and learnlogy.com for the work to be done on these 3 days.

I will be checking on who has logged in and who has not. Please do these for yourselves.

Regards,
Mrs Mak

PS - Please keep everyone in the loop as to as further updates. Check with your friends if they have the latest information. Please keep me in the loop as well. Thanks.

24 June to 26 June - E-learning

Dear all,
Please be informed that the Supplemsentary classes for next week, 24 June to 26 June will be cancelled due tot he worsening haze. In place of the classes, we will be having e-learning instead.

Please log in to mconline and learnlogy.com for the work to be done on these 3 days.

I will be checking on who has logged in and who has not. Please do these for yourselves.

Regards,
Mrs Mak

PLC - Percentage

Dear all,

Please click on this link to key in your findings.

Please key in your reflection for your learning.


Regards,
Mrs Mak

What to do during the March Holidays?

Dear all,
Please log on to your learnlogy.com to get the assigned online work done. Remember to go on to the 8pm race. on Wednesday (20 Mar), Thursday (21 Mar).

A little research- Find out more about speed and circles on your own before I start teaching. This is to encourage SDL.

If you can find any article on how speed and circles are applied in real life, that will be good to share in class.

Remember to have between 2 h to 3 h of rest & relax time for yourself  during the holidays - this is to recharge yourself.

When Term starts, we have to work really hard.

SA1 STARTS  from 20 May - 23 May. For those taking Higher MT, you will start on 15 May for Paper 1.

Regards,
Mrs Mak

Parents- Teacher Conference 15 Mar 2013

Dear parents,

Click on this link for the Parents-Teacher Conference slide show.

We hope to work together to bring out the best in your child.

Thanks.
Mrs Irene Mak