(29th march) next week's material (form 2)

teach them ratio rates and proportion.

same thing

use the siber practise as exercise

notes i think we have it, i will ask jian wen to print the notes later

first, explain what is this topic by asking them one silly question which is easy until ur dog knows how to do it.

in a classroom, there is 200 students...the ratio given is 2:3=Boy:Girl

find the number of girls in the classroom..

they sure ask...teacher...what is 2:3, what is ratio, i still dun understand...nvm...tell them..it's like i have a basket of oranges, in total, i have 10 oranges in the basket. the ratio of good to bad is 2:3...it means 2 portion of the oranges is bad...Hence, 10/5, u will get the difference, then times 2 to get to actual amount.

basically i will tell them to remember steps 1234:

(based on the Boys and Girls example)

1-what is the ratio (2:3)

2-what is the actual amount given ?(then give u the total students in the class 200), do u discover one thing, it's not good for comparison, so u have compare something light to light. so u have to total up the ratio, 2+3 to get 5

3-comparison, take 200(total in actual) divide by 5 (total in ratio) to get 40 (the difference)

4-ANS = 40 (the difference) x 2 (girls' portion, what the question want)

the answer will be 80 lo..=)

easy to explain ?

then later. u proceed to diff diff type of question

do this type of question first, before entering those got many many words wan

given m:n is 8:3, if m+n is 110 find n ? start with this type of question first

do around 5 question on this, insist them in using ur method (step 1234)

then proceed to harder question, which is the question like boys and girls...essay type wan.

Remember the step 1234, very very useful, tested in seminar, everybody know it.

***dun go into ratio in three quantities first ya!