Chong Yi Chen's answer to Kez's Primary 5 Maths Rate & Ratio Singapore question.
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I made two solutions based on whether you might have studied a little bit of algebra yet. The first solution is simpler, but a little more advanced. The second solution doesn't use algebra, and is very similar to what you did in the previous part, so you should be able to understand it.
Hope this helps!
Hope this helps!
Date Posted:
3 years ago
Thank you. My challenge is how to derive the equation 2×[(n+1)×n]? Can explain step by step to derive?
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