Woon Kiat's answer to vv's Primary 6 Maths Singapore question.
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The concept of average is about equal distribution.
If that's the case, you would realise that Faith's number of candies is 4 less than the average. As such, the other 2 friends have to give a total of 4 candies to him so that he can get the average. So what remain for the 2 friends would be (10+30)-4=36. Then, they can share the 36 to get the average 18.
So Faith actually has 18 - 4 =14.
Hopefully, this helps you to understand those steps. Because I am concern whether the algebra method is accepted in primary level.
A simple situation. If you have 20 candies and your friends has 24 candies, he just have to give you 2 candies so that you and him can both get the average 22.
Sorry it's a little lengthy.
If that's the case, you would realise that Faith's number of candies is 4 less than the average. As such, the other 2 friends have to give a total of 4 candies to him so that he can get the average. So what remain for the 2 friends would be (10+30)-4=36. Then, they can share the 36 to get the average 18.
So Faith actually has 18 - 4 =14.
Hopefully, this helps you to understand those steps. Because I am concern whether the algebra method is accepted in primary level.
A simple situation. If you have 20 candies and your friends has 24 candies, he just have to give you 2 candies so that you and him can both get the average 22.
Sorry it's a little lengthy.
Date Posted:
3 years ago
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