AC Lim's answer to Tsl's Primary 5 Maths Area & Volume Singapore question.
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U missed the small triangle. Hope this helps.
Date Posted:
4 years ago
I think she drew the lines. Just didn't think of using the complement method
Yeah. Think I misleading TSL from the 1st question. I never use full rectangle 27x15 instead I use 27x12 for calculation. But I can see TSL have the idea to solve this type of question already.
Not misleading at all haha. It's also using the complementary method, students mustn't have the idea of using only 1 way (full rectangle) to solve.
The 27 x 12 works since it's rectangle also. What I worry is students always want to start from the whole figure when not needed
The 27 x 12 works since it's rectangle also. What I worry is students always want to start from the whole figure when not needed
Thank you very much teacher J and AC Kim for the explanation
Sorry typo error. AC Lim
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