PRIMARY 3 MATHEMATICS

Make Primary 3 the year confidence and exam habits start building together.

Weekly live online classes for Primary 3 students in Singapore, paired with targeted practice that turns the year's syllabus jump into steady, manageable progress.
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Syllabus

What we cover

Chapters13
Sub-topics53

Primary 3 is the year the MOE Primary Mathematics syllabus accelerates noticeably. Students learn the multiplication tables for 6, 7, 8 and 9, work with numbers up to 10,000, meet fractions as proper numbers (equivalent fractions, simplifying, comparing, addition and subtraction with the same denominator), tackle perpendicular and parallel lines, read bar graphs with scales, work with angles (acute, right, obtuse), and start converting between km/m and kg/g. DeepThink covers the full syllabus, with bar models extended to comparison and multi-step structures from the first term.

Chapter 1Numbers to 10 000

  • Counting
  • Thousands, Hundreds, Tens and Ones
  • Comparing and Ordering Numbers
  • Number Patterns

Chapter 2Addition and Subtraction

  • Sum and Difference
  • Addition
  • Subtraction
  • Mental Calculation

Chapter 3Money

  • Making up $1, $10 or $100
  • Adding Money
  • Subtracting Money
  • Word Problems

Chapter 4Multiplication Tables of 6, 7, 8 and 9

  • Multiplication Table of 6
  • Multiplying and Dividing by 6
  • Multiplication Table of 7
  • Multiplying and Dividing by 7
  • Multiplication Table of 8
  • Multiplying and Dividing by 8
  • Multiplication Table of 9
  • Multiplying and Dividing by 9
  • Word Problems

Chapter 5Multiplication and Division

  • Multiplication
  • Division without Remainder
  • Division with Remainder

Chapter 6More Word Problems

  • Addition and Subtraction
  • Four Operations

Chapter 7Bar Graphs

  • Bar Graphs

Chapter 8Angles

  • Concept of Angles
  • Acute Angle, Right Angle and Obtuse Angle

Chapter 9Perpendicular and Parallel Lines

  • Perpendicular Lines
  • Drawing Perpendicular Lines
  • Parallel Lines
  • Drawing Parallel Lines
  • Horizontal and Vertical Lines

Chapter 10Fractions

  • Equivalent Fractions
  • Simplifying Fractions
  • Comparing and Ordering Fractions
  • Addition and Subtraction of Fractions

Chapter 11Length, Mass and Volume

  • Measuring Length in Metres and Centimetres
  • Measuring Length in Kilometres and Metres
  • Measuring Mass in Kilograms and Grams
  • Measuring Volume in Millilitres
  • Measuring Volume in Litres and Millilitres
  • Word Problems

Chapter 12Area and Perimeter

  • Area in Square Units
  • Area in Square Centimetres
  • Area in Square Metres
  • Perimeter in Centimetres
  • Perimeter in Metres
  • Area and Perimeter of Squares and Rectangles

Chapter 13Time

  • Time in Seconds
  • 24-hour Clock
  • Starting Time, Finishing Time and Duration
Note

Primary 3 is also the first year most Singapore primary schools run termly Weighted Assessments (WAs) and a year-end SA2 paper — mid-year SA1 was removed for P3 in 2021, but WAs and SA2 still mark the start of proper exam habits. WA- and SA2-style timed practice is introduced gradually from the second term so the first formal Math paper does not feel alien.

Common challenges at this level

Primary 3 students often face:

Fractions as a new kind of number

Primary 3 introduces fractions properly. Understanding that ⅓ is a single number — not "one and three" — and that ½ and 2/4 represent the same quantity is a significant conceptual shift that catches many students off guard.

Bar model complexity increases

Problems now require comparison models and part-whole models with more steps. Students who relied on guessing or keyword-matching in Primary 1–2 hit a clear ceiling here.

Multiplication gaps from Primary 2 surface

Tables for 6, 7, 8 and 9 are layered on top of the 2, 3, 4, 5, 10 facts students should already know. Any wobbliness in the earlier tables becomes a visible bottleneck during division and word-problem work.

First experience of formal exam papers

Primary 3 is the year termly Weighted Assessments (WAs) and the year-end SA2 paper begin — the first proper Math papers most students sit. (Mid-year SA1 was removed for P3 in 2021.) WAs and SA2 still demand pacing, presentation, and the ability to handle questions students cannot solve immediately.

Larger numbers stress mental computation

Numbers up to 10,000 require students to be quick and accurate with place value, regrouping, and mental shortcuts. Slow mental computation makes every word problem feel harder than it is.

Faster syllabus pace

Primary 3 covers more topics in less time than Primary 1 or 2. Students who need extra practice on a concept may feel rushed before it is secure, leaving small gaps that compound into Primary 4.

How DeepThink helps Primary 3 students

DeepThink supports Primary 3 students through the syllabus jump and the first proper exam year:

Fractions taught visually first

Equivalent fractions, simplification, and same-denominator addition and subtraction are taught with bar diagrams and number lines before symbols — so students build intuition, not just rules.

Bar-model fluency expanded

Comparison models, part-whole models, and multi-step models are practised across topics, so students see how the same tool solves apparently different problems.

Gap-closing for Primary 2 weak spots

Targeted practice surfaces shaky tables, place-value confusion, and weak two-step word-problem skills from Primary 2, and rebuilds them before they cripple Primary 3 topics.

Exam-style practice from term 1

WA- and SA2-style questions are introduced gradually so the first formal Math paper does not feel alien. Students get used to pacing, format, and the discipline of attempting every question.

Parents see what to focus on

After each lesson, parents get a clear picture of which topics are secure and which need a short review at home — making home practice efficient instead of scattershot.

Primary 3 is the year fluency, fractions, and exam habits all need to develop together. We help all three happen in parallel.

Program facts

What families should know about Primary 3 support

The details parents usually want before deciding whether to book a trial.

Lesson format

Weekly 1.5-hour live online class

Targeted online practice with instant marking supports work between lessons.

Class size

Maximum 4 students

Students are grouped by learning pace, not just by level — if no existing session matches your child’s pace, we open a new one.

Syllabus focus

MOE Primary Mathematics

Full curriculum and chapter list shown in the syllabus section above.

Pricing

$50 per live class

Same fee across levels and streams.

Trial

Free trial class available

Parents can see the teaching pace, structure, and student experience before committing.

Best fit

Students in Primary 3 who need stronger foundations and calmer weekly revision.

Decision support

When Primary 3 support is the right fit

These are the situations where extra support tends to make the biggest difference.

Fractions as a new kind of number

Primary 3 introduces fractions properly. Understanding that ⅓ is a single number — not "one and three" — and that ½ and 2/4 represent the same quantity is a significant conceptual shift that catches many students off guard.

Bar model complexity increases

Problems now require comparison models and part-whole models with more steps. Students who relied on guessing or keyword-matching in Primary 1–2 hit a clear ceiling here.

Multiplication gaps from Primary 2 surface

Tables for 6, 7, 8 and 9 are layered on top of the 2, 3, 4, 5, 10 facts students should already know. Any wobbliness in the earlier tables becomes a visible bottleneck during division and word-problem work.

If any of these patterns sound familiar, this is likely the right level of support for your child — a trial class is a good next step.

Frequently asked questions

Clear answers for parents

What does Primary 3 Math cover in Singapore?

The MOE Primary 3 Mathematics syllabus covers numbers up to 10,000, addition and subtraction with renaming, the multiplication tables for 6, 7, 8 and 9, division with and without remainder, fractions as numbers (equivalent fractions, simplifying, comparing, addition and subtraction with the same denominator), perimeter, angles (acute / right / obtuse), perpendicular and parallel lines, bar graphs, length in km/m and m/cm, mass in kg/g, volume in millilitres and litres, money problems, and 24-hour time.

Why is Primary 3 considered a turning point?

Three things happen in Primary 3 that did not happen in Primary 1 or 2: fractions are introduced as proper numbers, the harder multiplication tables (6 to 9) are layered on top of earlier ones, and most schools run their first formal Math papers — termly Weighted Assessments and a year-end SA2 paper. Students who arrive with weak Primary 2 fluency feel all three at once, which is why parents often notice grades slipping in Primary 3 even when their child seemed fine before.

How important are Weighted Assessments and SA2 in Primary 3?

Primary 3 Weighted Assessments and the year-end SA2 do not affect secondary school posting (mid-year SA1 was removed for Primary 3 in 2021), but they matter as the first proper exam experience. Schools also use Primary 3 results to start identifying students for additional support or for stretch programmes. Strong Primary 3 results establish momentum and self-belief that carries into Primary 4 and 5.

My child is struggling with fractions — is that normal?

Yes — the leap from "fractions as halves and quarters" in Primary 2 to "fractions as numbers you can add, simplify, and compare" in Primary 3 is one of the biggest conceptual jumps in the entire primary syllabus. The fix is visual: bar models and number lines first, then symbols. Students who learn fractions only as rules tend to forget them; students who build a visual mental model retain them.

How does bar modelling change at Primary 3?

Primary 3 bar models start including comparison structures (one bar longer than another) and multi-step part-whole models. Students who only learned the basic "two parts make a whole" model at Primary 2 need to extend their toolkit. Lessons explicitly teach which bar shape to draw for which question type.

Should we start tuition because grades are dropping?

A drop in Primary 3 grades almost always signals one of three things: shaky multiplication tables, weak fraction understanding, or under-developed bar-model habits. A diagnostic trial class identifies which, so support targets the actual cause rather than vague "more practice".

Can families start with a trial class first?

Yes. Families can book a free trial Primary 3 Math class to see the teaching pace, the structure of the live session, and how the targeted practice between lessons works — before deciding whether to enrol for weekly classes.

How many students are in each class?

Four, at most. Students are grouped by learning pace, not just by year level, so each lesson moves at the speed of the students actually in it. When no session matches a child’s pace, we open a new one. In a class that size, every child answers questions, gets their working checked, and gets help the moment they need it.

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