P3 Math Hide and Seek: Five Everyday Questions

A bag of marbles, a sticker sheet, two ribbons, a juice jug and a garden plot pop onto the screen in an arc. "Maths is playing hide and seek. Can you find five P3 questions?" Each object turns out to be hiding one.

That is Math is Playing Hide and Seek, a Primary 3 episode of our Topic Explainers series. Each question is read, then a calm ring counts down from 10 while your child thinks, and then the answer appears with one line of working. Watch it with your child, pausing whenever more time is needed, then read on.

Math is playing hide and seek: five P3 questions in five everyday things. Five cards. Take your time.

The five objects are things a P3 child plays with or helps to look after, and each hides a question from a different topic: division, subtraction, fractions, measurement and area. The point is not the objects themselves. It is the habit of noticing that the math was there all along, and then taking the time to find it.

The method

The video's two taglines carry the whole method: "Maths is playing hide and seek" and "Take your time."

Find the question in the object. Before any calculating, your child should be able to say what the question is really asking. A bag of marbles shared into cups is a division. A sticker sheet with some peeled off is a subtraction. Two ribbons side by side are a comparison. A jug with a scale is a measurement. A garden is an area. Naming the operation first is half of the work, and it is the step children skip most often in word problems.

Take your time. Every card in the video has a countdown, but it also has a pause pill: "Need more time? Pause the video." Speed is not the goal. A P3 child who pauses, thinks and gets it right is learning far more than one who guesses before the ring runs out.

Check with the object. After the answer, go back to the bag, the sheet or the jug and ask whether the answer makes sense there.

Here are the five hidden questions:

Object	Question	Answer
Bag of marbles	What is `60 ÷ 7`? Give the remainder too.	8 remainder 4
Sticker sheet	4203 stickers, 1758 sold. How many are left?	2445
Two ribbons	Which fraction is greater: `3/5` or `7/10`?	`7/10`
Juice jug	A jug holds 2 ℓ 350 ml of juice. How many ml?	2350 ml
Garden plot	A garden is 9 m long and 6 m wide. What is its area?	54 m²

Cover the last column if your child wants to try them first. Three are worked in full below.

Worked examples

Worked example 1: the bag of marbles

There are 60 marbles to share equally into 7 cups. How many go in each cup, and how many are left over? In numbers: 60 ÷ 7, with the remainder.

Step 1: Find the question. Sharing equally into groups is division.

Step 2: Use the 7 times table. Count up in 7s until the next one would go past 60: 7 × 8 = 56, and 7 × 9 = 63, which is too many. So each cup gets 8 marbles.

Step 3: Find what is left. 60 − 56 = 4. Four marbles are left over.

Answer: 60 ÷ 7 = 8 remainder 4, often written as 8 r 4.

Check: 7 × 8 + 4 = 56 + 4 = 60. The remainder, 4, is less than 7, so no cup can get another marble.

That last check is worth teaching on its own. A remainder is always smaller than the number you are dividing by. If it is not, another round of sharing is possible.

Worked example 2: the sticker sheet

A shop had 4203 stickers and sold 1758 of them. How many stickers are left?

Step 1: Find the question. "Sold" means some are taken away, so this is subtraction: 4203 − 1758.

Step 2: Take away in friendly parts. Instead of subtracting all of 1758 at once, split it into 1700 and 58.

4203 − 1700 = 2503
2503 − 58 = 2445

Answer: 2445 stickers are left.

Check: add back. 2445 + 1758 = 4203. That matches the number we started with.

The column method works too, but 4203 has a zero in the tens place, so your child has to regroup from the hundreds before the ones can borrow. Splitting the number into friendly parts avoids that, and it is a useful mental method to have alongside the written one. A quick estimate also helps: about 4200 take away about 1800 is about 2400, so 2445 is the right size.

Worked example 3: the juice jug

A jug holds 2 ℓ 350 ml of juice. How many millilitres is that?

Step 1: Find the question. The amount is in two units, litres and millilitres, and we want it in millilitres only.

Step 2: Change the litres. 1 litre is 1000 ml, so 2 litres is 2 × 1000 = 2000 ml.

Step 3: Add the millilitres. 2000 + 350 = 2350.

Answer: the jug holds 2350 ml.

Check: 2350 ml is a little more than 2 litres, and 2 ℓ 350 ml is a little more than 2 litres too. The sizes match.

The jug in the video has a scale with no numbers on it, which is a gentle reminder that measurement is about reading the amount, not just the digits.

The other two cards, in brief

The two ribbons. One ribbon is cut into fifths with 3 shaded, the other into tenths with 7 shaded. To compare 3/5 and 7/10, make the parts the same size: cut each fifth into two, so 3/5 = 6/10. Now 7 tenths is more than 6 tenths, so 7/10 is greater. This is exactly the recutting idea in our P3 equivalent fractions post, told with pizza.

The garden plot. The area of a rectangle is length × width. 9 × 6 = 54, so the garden has an area of 54 m². Remind your child that area is measured in square units, so the answer is in m², not m.

Common mistakes

Starting to calculate before finding the question. Ask, "What is this question really asking? Sharing, taking away, comparing, changing units or finding a space?"
A remainder that is too big. Writing 60 ÷ 7 = 7 remainder 11. If the remainder is 7 or more, there is enough for another round of sharing.
Subtracting the smaller digit from the larger in each column. For 4203 − 1758, this gives 3555. An estimate (about 2400) shows straight away that it is too big.
Losing the zero in measurement. 2 ℓ 35 ml is 2035 ml, not 235 ml. Writing 2 ℓ as 2000 ml first, then adding, keeps every digit in the right place.
Comparing fractions by the numerators only. 7/10 has the bigger numerator here, but that is luck. Make the parts the same size before comparing.
Mixing up area and perimeter. The fence around the 9 m by 6 m garden is 30 m long; the grass inside is 54 m². Ask, "Are we going round it, or covering it?"

Parent tips

Play hide and seek at home. Pick one everyday thing, such as a bag of oranges, a bottle of water or a pack of stickers, and ask your child to make up a math question about it. Then swap: you make one up for them.
Pause at every card. The countdown in the video is short for a P3 child. Pause the moment a question appears, let your child work it out on paper, then play the reveal.
Say the question in your own words. Before solving, ask your child to retell the question. If they can say "we're sharing 60 marbles into 7 cups", the calculation usually follows.
Check with the real thing. Share a few dried beans into cups, pour water into a measuring jug, or pace out a corridor. A concrete check makes the answer feel true.
Praise the pause. "You took your time on that one and got it right" is worth more than "That was fast".

If you are wondering why a few questions a day work better than a long sitting, our post on why five a day works explains the little-and-often habit. For the shape of a full P3 paper, Primary 3 sample questions explained walks through several question types.

Five cards. Take your time.

The video ends on its tagline: "Five cards. Take your time." That is the idea behind Daily Five drills in Singapore Math Drills: five hand-picked drill cards waiting each day, so your child never has to decide what to practise, and can spend the time on the thinking instead.

Practice is calm by design: no guilt-tripping over a missed day and no dark patterns, and your child's progress is only ever measured against their own. The math is hiding everywhere. Five cards a day is enough to start finding it.

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