goodsamathritan's answer to Darren's Primary 5 Maths Area & Volume Singapore question.
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I call this method ‘’Big minus Small’, in this case, larger rectangle minus small rectangle. Just imagine taking a larger piece of paper, cutting the smaller piece out, leaving behind the area of the concrete path.
Date Posted:
4 years ago
Good explanation for me cause I'm not really good in maths
Wow I didn't know can do that
My method is outer- inner
20x14=280
12x18=216
280-216=64
But I will follow your method thank you
My method is outer- inner
20x14=280
12x18=216
280-216=64
But I will follow your method thank you
what you’re doing is exactly the same! it’ll be better to show the addition of 1 m, don’t just magically pop out 20 and 14 ;)
Ok understand
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