See AC Lim's answer to Tsl's Primary 5 Maths Area & Volume Singapore question

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: 5 years ago

Comments 5 add a comment

5 years ago

I think she drew the lines. Just didn't think of using the complement method

AC Lim

5 years ago

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.

5 years ago

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

Tsl

5 years ago

Thank you very much teacher J and AC Kim for the explanation

Tsl

5 years ago

Sorry typo error. AC Lim

AC Lim's answer to Tsl's Primary 5 Maths Area & Volume Singapore question.

Ac Lim's answer

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