We have all learned about ratio in Primary 5 and 6, so we will just give you a quick recap on what is ratio.
In general, a ratio of 2:3 means that the amount of the first ratio is two thirds of the amount of the total quantity. For example, if the first ratio refers to the amount of tables and the second ratio is the number of chairs. It would mean that there are more chairs than tables in the classroom.
Ratios can be easily converted into fractions and percentage. Using the same example, the number of tables is 2/5 of the total number of furniture. The chairs would be 60% of the total amount of stuff.
Question for this Topic:
I have 516 pieces of coloured paper in a plastic bag. They are in 3 different colours, red, yellow and blue, but are not equal in number. The number of red paper is twice the number of blue paper. The yellow paper is 3 times the number of blue paper.
What is the number of
(a) Red paper?
(b) Yellow paper?
(c) Blue paper?
Answer this question in the comments section.
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R = 2B
ReplyDeleteY = 3B
B = 1B
6B altogether = 516
B = 86
Red = 172
Yellow = 258
Blue = 86
Red --> 2u
ReplyDeleteBlue --> 1u
Yellow --> 3u
2u+1u+3u=6u
Therefore 6u --> 516
1u --> 86 (Blue)
2u --> 172
3u --> 258
-Joshua ;D
This comment has been removed by the author.
ReplyDeleteR : B : Y
ReplyDelete2 : 1
~~~ 1 : 3
~~~~~~~~~~
2 : 1 : 3
5 units --> 516
1 unit --> 86 ( Blue )
2 units --> 172 ( Red )
3 units --> 258 ( Yellow )
Leong Xue Hao
1P1 (15)
This is quite nicely blog with the sums. I feel that you should work more on the logic.
ReplyDeleteI think that you should provide answers so that the people who is not so good is maths can take the answers as reference.
ReplyDelete@junyingg: We will post the answers after some people have attempted the question. =D
ReplyDelete