Matrix Math

Primary 5 CHIJ St Nicholas Primary Term 2 Math WA Review

Did you know the Great Pyramid has some amazing math behind it?

Its base is almost a perfect square, with all four sides nearly the same length.

And here’s the surprising part — if you divide its base perimeter by twice its height, the answer is very close to π.

A beautiful example of geometry in real life.

Primary 5 St Hilda Term 2 Math Review

Primary 5 Pei Chun Primary Term 2 Math WA Review

Yenni gives John $2.

Now they have the same amount.

So… how much more money did Yenni have than John at first?

Careful — the answer is not $2.

Think about what happens when money is transferred from one person to another.

Four bags. Three clues. One heaviest bag.

Can your child work it out using logic — not guessing?

Drop your answer in the comments.
Could you solve it before the answer was revealed?

Only 5% of people can answer this in 5 seconds. Can you?

Drop your answer in the comments — and tell us if you solved it in 5 seconds.

Most parents think it’s carelessness.

But when children write 65 as 56 or 69 as 96,
it’s often developmental — not laziness.

Young children first process numbers as visual symbols.
Order, direction and orientation take time to stabilise.

That’s why:
✔ The thinking can be correct
✔ The method can be correct
✖ But the written number is wrong

The solution usually isn’t scolding or endless drilling.
It’s stronger place-value structure and slowing writing to match thinking.

Understanding changes how we teach.

Save this if your child struggles with digit reversals.
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