How To Solve Word Problems In Math (Singapore Primary Level Tutorial)

Solving math word problems at Primary level in Singapore can feel like decoding a secret message.

You see a paragraph of English… somewhere inside got numbers… and the teacher says, “Show your working.”

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If you’re aiming for AL 1–AL 3 for PSLE Math, you must be solid at word problems. They’re a huge part of the MOE syllabus, and they’re exactly where many students lose marks.

In this guide, I’ll walk you through:

• A step-by-step tutorial to attack almost any Primary word problem
• Exam strategies specific to PSLE-style questions
• Worksheet-style practice, including harder variants
• Common mistakes Singapore students often make

And along the way, I’ll show you how you can use Tutorly.sg – a 24/7 AI tutor website built specially for Singapore students – to practise smarter, not just more.

Tutorly.sg has already been used by thousands of students in Singapore and was even mentioned on Channel NewsAsia (CNA), so you’re in good company if you use it to prepare.

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Step-by-step tutorial

Let’s build a simple system you can follow every time.

I’ll use Primary 4–6 / PSLE style examples, but the same ideas apply from about Primary 3 onwards.

The 6-step method for word problems

You can remember this as: R-U-P-S-C-A

1. Read
2. Underline
3. Plan
4. Solve
5. Check
6. Answer in sentence

Let’s go through each step with examples.

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Step 1: Read (and summarise the story)

Don’t rush. For the first read, don’t touch your pencil.

Ask yourself:

• Who or what is the question talking about? (people, items, money, distance, etc.)
• What is happening? (buying, sharing, comparing, adding, removing)
• What are they asking for at the end?

Example 1 (P 4–P 5 level):

Ali had 128 stickers.
He gave some stickers to Ben and had 79 stickers left.
How many stickers did Ali give to Ben?

Quick mental summary:

• Ali started with 128.
• After giving away, he has 79 left.
• They want to know: How many given away?

That’s it. No working yet, just understand the story.

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Step 2: Underline (key info + question)

Now you go back and underline or circle:

• Important numbers
• Important words (like “more than”, “left”, “shared equally”)
• The actual question

Using the same example:

Ali had 128 stickers._
He gave some stickers to Ben and had 79 stickers left.
How many stickers did Ali give to Ben?

Key ideas:

• Start: 128 stickers
• End: 79 stickers
• Operation hint: “gave some” → something is taken away (subtraction)

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Step 3: Plan (what operation / model?)

This is where most students jump straight into guessing. Instead, pause and ask:

• Is this one step or many steps?
• Is it about total, difference, equal sharing, before & after, or ratio?
• Should I draw a model? $for P 3–P 6, usually yes$

For Example 1:

• One-step problem
• “Start – given = left”
• So: $128 - \text{(given)} = 79$

Rearrange:
$\text{given} = 128 - 79$

No model needed here because it’s very straightforward, but if you like, you can draw a bar for 128, then show 79 as the remaining part.

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Step 4: Solve (show neat working)

Now you actually do the calculation.

$128 - 79 = 49$

Make sure:

• Numbers are lined up properly $for addition/subtraction$
• You label your working clearly if there are multiple steps

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Step 5: Check (does it make sense?)

Train yourself to quickly check:

• Is my answer too big or too small?
• If I substitute back into the story, does it work?

Check Example 1:

• Start with 128, give away 49, left with $128 - 49 = 79$ → matches the question.
• So 49 is reasonable.

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Step 6: Answer in sentence

For PSLE and school exams, you must answer in a proper sentence.

Answer:
Ali gave 49 stickers to Ben.

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Applying the method to a slightly harder problem

Let’s try a two-step Primary 5–6 style question.

Example 2:

A bakery sold 3 times as many buns on Saturday as on Friday.
It sold 420 buns on Sunday, which was 60 fewer than on Saturday.
How many buns did the bakery sell on Friday?

Step 1: Read

• Friday: unknown
• Saturday: 3 times Friday
• Sunday: 420, which is 60 fewer than Saturday
• Need: Friday’s number

Step 2: Underline

A bakery sold 3 times as many buns on Saturday as on Friday.
It sold 420 buns on Sunday, which was 60 fewer than on Saturday.
How many buns did the bakery sell on Friday?

Step 3: Plan

This is a comparison & multiplication type problem. Use a bar model.

Let Friday be 1 unit.
Saturday = 3 units.
Sunday is 60 fewer than Saturday, but we know Sunday is 420.

So:

• Saturday = Sunday + 60
• Saturday = $420 + 60 = 480$ buns
• Saturday $3 units$ = 480
• Friday $1 unit$ = $480 \div 3$

Step 4: Solve

1. Saturday buns:
   $420 + 60 = 480$

2. Friday buns:
   $480 \div 3 = 160$

Step 5: Check

• Friday: 160
• Saturday: $3 \times 160 = 480$
• Sunday: $480 - 60 = 420$ → matches the question.

Step 6: Answer in sentence

The bakery sold 160 buns on Friday.

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Types of Primary word problems (and how to recognise them)

In Singapore’s MOE syllabus, most Primary word problems fall into a few common patterns:

1. Part–whole / total problems

   • “How many altogether?”
   • “How many more needed to reach…?”

2. Comparison problems

   • “A has 35 more than B.”
   • “How many more…?” / “How many fewer…?”

3. Before–after / change problems

   • “After giving away…”
   • “After spending…”
   • “At first… In the end…”

4. Equal sharing / grouping

   • “Shared equally among…”
   • “How many in each group?” / “How many groups?”

5. Fractions / ratio (upper Primary / PSLE)

   • “$\frac{3}{5}$ of the pupils are girls…”
   • “The ratio of boys to girls is 2 : 3…”

When you read a question, try to label it in your mind:

“Ah, this is a comparison problem.”
“This one is a before-and-after with money.”

Once you know the type, you can reuse the same style of model and steps.

If you want to practise specific types on your own, you can go to:
https://tutorly.sg/ai-tutor-singapore
Choose your level and topic $e.g. “P 5 Math – Fractions word problems”$, and Tutorly will generate questions that match the Singapore syllabus.

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Exam strategy guide

Now that you know the basic method, let’s talk about PSLE-style exam strategies. These can make the difference between AL 3 and AL 1.

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1. Don’t spend 15 minutes on one killer question

In PSLE Math, the long word problems usually appear in the later part of Paper 2. Some can be really tough.

Strategy:

• If you’re stuck for more than 4–5 minutes, move on.
• Circle the question number, come back later.
• Secure all the easier marks first.

Many students lose marks not because they can’t do the hard questions, but because they run out of time for questions they actually know how to do.

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2. Use models, not guesswork

For Primary 3–6, the bar model is your best friend.

Use models especially for:

• “More than / fewer than” comparison
• “At first / after” problems
• Fraction of a whole (e.g. $\frac{3}{7}$ of something)
• Ratio questions $P 6 / PSLE$

You don’t get extra marks just for drawing a model, but you do get marks for correct working. A clear model:

• Reduces careless mistakes
• Helps you see which operation to use
• Makes it easier to check your answers

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3. Highlight time words and tricky phrases

In PSLE papers, they love to use phrases that confuse students:

• “At first”
• “In the end”
• “After some were sold / given away / added”
• “Altogether” vs “each”
• “More than” vs “times as many”

Train yourself to underline these.

Example phrase:
“Ali has 3 times as many marbles as Ben.”

Many students misread as “3 more than”.
But “3 times as many” means Ali = 3 × Ben, not Ali = Ben + 3.

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4. Estimate before calculating

For questions with big numbers or decimals, do a quick estimation:

• Round numbers $e.g. 198 ≈ 200, 51 ≈ 50$
• Ask: “Should the answer be around 100? 1000? 0.5?”

This helps you catch nonsense answers like:

• Negative number of apples
• 0.002 km when it should be around 2 km
• 5000 pencils when the question is about a small class

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5. Write something for long questions

In PSLE, even if you don’t know how to finish the whole question, you can often score method marks for:

• Correct model
• Correct equation
• One correct intermediate step

So don’t leave long questions totally blank. Show what you do know.

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6. Build speed and confidence before the exam

Closer to exams:

• Practise mixed worksheets (different topics in one paper)
• Time yourself $e.g. 20 questions in 40 minutes$
• After each practice, review your mistakes, not just your score

If you’re practising online, you can use https://tutorly.sg/app to:

• Try exam-style questions
• Get instant answers with step-by-step solutions
• Quickly see where you went wrong and how to fix it

Because Tutorly.sg is available 24/7 as a website, you can revise whenever you have small pockets of time – before CCA, after tuition, or even just 15 minutes before bed.

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Worksheet practice

Let’s go through some practice questions together, from easier to harder. You can treat this like a mini worksheet.

Try each question on your own first, then check the solution.

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Section A: Warm-up questions (P 3–P 4 style)

Q 1. Simple part–whole

Tom has 67 marbles.
He buys 25 more marbles.
How many marbles does Tom have now?

Solution:

This is a total problem.

$67 + 25 = 92$

Answer: Tom has 92 marbles now.

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Q 2. Comparison

Mei Ling has 48 stickers.
Jia Hao has 19 fewer stickers than Mei Ling.
How many stickers does Jia Hao have?

Solution:

This is a comparison (“fewer than”) problem.

$48 - 19 = 29$

Answer: Jia Hao has 29 stickers.

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Section B: Mid-level questions (P 4–P 5 style)

Q 3. Before–after with money

Sarah had $150. She spent$48 on a book and$27 on a bag.
How much money did she have left?

Plan:

• Total spent = book + bag
• Money left = $150 - \text{total spent}$

Solution:

1. Total spent:
   $48 + 27 = 75$

2. Money left:
   $150 - 75 = 75$

Answer: She had $75 left.

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Q 4. Sharing equally

A teacher had 96 sweets.
She shared them equally among 8 pupils.
How many sweets did each pupil receive?

Solution:

This is an equal sharing problem.

$96 \div 8 = 12$

Answer: Each pupil received 12 sweets.

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Section C: Upper Primary / PSLE-style questions (harder variants)

Now let’s look at harder ones that feel more like Paper 2 questions.

Q 5. Two-step comparison (P 5 level)

There are 240 books on two shelves.
The top shelf has 3 times as many books as the bottom shelf.
How many books are there on the top shelf?

Plan:

Let bottom shelf = 1 unit.
Top shelf = 3 units.
Total = 4 units = 240.

So:

• 4 units = 240
• 1 unit = $240 \div 4$
• Top shelf = 3 units

Solution:

1. 1 unit:
   $240 \div 4 = 60$

2. Top shelf $3 units$:
   $3 \times 60 = 180$

Answer: There are 180 books on the top shelf.

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Q 6. Fraction of a quantity (P 5–P 6 level)

$\frac{3}{5}$ of the pupils in a class are girls.
If there are 18 boys, how many pupils are there in the class?

Plan:

If $\frac{3}{5}$ are girls, then:

• Girls: $\frac{3}{5}$
• Boys: $\frac{2}{5}$

We know boys = 18 → $\frac{2}{5}$ of class = 18.

So:

• $\frac{1}{5}$ of class = $18 \div 2$
• Whole class = $5 \times \frac{1}{5}$

Solution:

1. $\frac{1}{5}$ of class:
   $18 \div 2 = 9$

2. Whole class:
   $9 \times 5 = 45$

Answer: There are 45 pupils in the class.

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Q 7. Harder before–after with units (P 6 / PSLE-style)

At first, Ali had 3 times as many stamps as Ben.
After Ali gave away 24 stamps to Ben, both of them had the same number of stamps.
How many stamps did Ali have at first?

This is a classic PSLE-style before–after word problem.

Step 1: Understand

At first:

• Ali: 3 units
• Ben: 1 unit

After giving 24 from Ali to Ben, they become equal.

Step 2: Model (think in words)

When Ali gives 24 to Ben:

• Ali loses 24
• Ben gains 24

The difference between them decreases by 2 × 24 = 48.

At first, the difference is:

• $3 \text{ units} - 1 \text{ unit} = 2 \text{ units}$

After the transfer, difference becomes 0 (because they are equal).

So:

• 2 units difference = 48

Step 3: Solve

1. 2 units = 48
   $1 \text{ unit} = 48 \div 2 = 24$

2. Ali at first $3 units$:
   $3 \times 24 = 72$

Answer: Ali had 72 stamps at first.

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Q 8. Challenging fraction / transfer question (Hard PSLE variant)

A tank was $\frac{3}{4}$ full of water.
After 18 litres of water were used, the tank became $\frac{3}{8}$ full.
What is the capacity of the tank?

Step 1: Understand

At first: $\frac{3}{4}$ full
After using 18 L: $\frac{3}{8}$ full

Amount decreased by:

$\frac{3}{4} - \frac{3}{8}$

Step 2: Find the fraction used

Convert $\frac{3}{4}$ to eighths:

$\frac{3}{4} = \frac{6}{8}$

So:

$\frac{6}{8} - \frac{3}{8} = \frac{3}{8}$

So $\frac{3}{8}$ of the tank’s capacity = 18 L.

Step 3: Find full capacity

If $\frac{3}{8}$ → 18 L, then:

1. $\frac{1}{8}$ of tank:
   $18 \div 3 = 6 \text{ L}$

2. Whole tank $8 parts$:
   $6 \times 8 = 48 \text{ L}$

Answer: The capacity of the tank is 48 litres.

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How to turn these into real worksheets

To really improve, you need lots of practice across different types and difficulty levels.

Here’s a simple way to structure your weekly practice:

• Day 1–2:
  Focus on one type (e.g. comparison). Do 8–10 questions.
• Day 3–4:
  Focus on another type (e.g. before–after, fractions).
• Day 5–6:
  Do a mixed set of 10–15 questions from different topics.
• Day 7:
  Go through your mistakes. Re-do the questions you got wrong.

If you don’t have enough good questions or you’re tired of flipping assessment books, you can use:

• https://tutorly.sg/ai-tutor-singapore – to generate Singapore-syllabus questions by level and topic
• https://tutorly.sg/app – to get instant answers and step-by-step solutions whenever you’re stuck

Because Tutorly.sg is a website, you can use it on any device with a browser – no need to download anything.

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Common mistakes

You’re not the only one who struggles with word problems. Here are some very common mistakes I see from Singapore Primary students, and how you can fix them.

1. Skipping the “understand” step

Many students:

• See numbers
• Immediately start adding or subtracting

Fix:

• Force yourself to read once without writing.
• Then read again and underline key words.
• Ask: “Is this a total / difference / sharing / before–after / fraction problem?”

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2. Mixing up “more than” and “times as many”

These phrases look similar but mean very different things.

• “3 more than” → $x + 3$
• “3 times as many” → $3 x$

Example:

Ali has 3 times as many stickers as Ben.

If Ben has 10:

• 3 more than 10 = 13
• 3 times 10 = 30

In word problems, this error can totally change your answer, even if your working looks tidy.

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3. Forgetting units or giving incomplete answers

Examples:

• Writing just 45 instead of 45 pupils
• Writing Ali instead of Ali and Ben when the question asks, “How many stamps do Ali and Ben have altogether?”

Fix:

• After you get a number, re-read the last sentence of the question.
• Answer exactly what they ask, in a full sentence, with units.

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4. Not checking if the answer makes sense

Common nonsense answers:

• Negative number of sweets
• 0.02 kg when the question is about a full bag of rice
• Fraction of people $e.g. 3.5 pupils$

Fix:

• Do a quick estimation.
• Ask: “Could the answer really be this small / big?”
• For sharing questions, check:
  • If you share 96 sweets among 8 pupils, answer should be less than 96, not more.

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5. Poor time management

Spending 20 minutes on one killer question and then rushing the rest is a very Singapore thing during PSLE.

Fix:

• Practise with a timer at home.
• Set a rough rule:
  • 1-mark question: ~1 minute
  • 2-mark question: ~2 minutes
  • 3–5-mark long questions: 4–6 minutes
• If you’re stuck, move on and come back later.

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6. Only practising “nice” questions

In school homework, sometimes the word problems are quite standard. But PSLE often has:

• Tricky phrasing
• Unusual combinations $fractions + before–after + units$
• Questions that don’t look like anything you’ve seen

If you only practise easy, familiar patterns, you may panic in the exam.

Fix:

• Mix in harder variants during revision.
• After you learn a new type (e.g. fraction word problems), try 1–2 challenging ones.
• Use something like Tutorly.sg to generate fresh questions so you don’t just memorise answers.

On https://tutorly.sg/ai-tutor-singapore, you can:

• Select your level $e.g. P 6$ and topic
• Ask for harder questions or exam-style questions
• See step-by-step solutions to understand why the method works

This is especially helpful if you don’t have a tutor sitting next to you 24/7.

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Ready to practise smarter?

Word problems don’t have to be scary. Once you:

• Follow a clear step-by-step method (R-U-P-S-C-A)
• Recognise common problem types
• Use good exam strategies
• Practise with varied, challenging questions

your confidence will grow, and your PSLE Math grade will follow.

If you want a Singapore-specific AI tutor website that’s always ready to help you with one more question, try:

• Tutorly.sg AI Tutor:
  Practice by topic and level with instant, MOE-aligned questions –
  https://tutorly.sg/ai-tutor-singapore

• Tutorly.sg Web App:
  Ask any Primary/PSLE math word problem and get a clear, step-by-step solution, anytime –
  https://tutorly.sg/app

Use it like a friendly on-demand tutor: when you get stuck, when you want more practice, or when you’re revising late at night and need someone (or something) to walk you

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Ready to practise?

If you want a Singapore-focused AI tutor you can use immediately $website, no sign-up$, try Tutorly here:

• https://tutorly.sg/ai-tutor-singapore
• https://tutorly.sg/app

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