What’s Tested in Primary 5 Weighted Assessment 3 (WA3) 2026?

Primary 5 Weighted Assessment 3, or WA3, is an important checkpoint because it is usually the last school-based test before the final examination. This means WA3 can give parents and students a clearer idea of which topics are already strong, and which areas need more revision before the year-end exam. I will also share common mistakes I see students make or struggle with, based on questions I have gone through during 1-to-1 lessons.

Based on available Primary 5 Term 3 learning and assessment information, the topics tested may include the main Term 3 Mathematics topics. However, the exact WA3 topics and format may differ from school to school, so parents should always check the latest information from the child’s teacher, school letter, student handbook, Parents Gateway announcement, or assessment schedule.

For Primary 5 Standard Mathematics, the likely topics include:

1. Decimals
2. Rate
3. Percentage

Again, this is only a general guide. Please check with your child’s school or teacher for the confirmed 2026 WA3 scope.

Why WA3 Matters

WA3 is not just another small test. Since it comes before the final examination, it helps students practise under exam conditions and shows whether they can apply what they have learnt in Term 3.

For parents, WA3 is a useful signal. If your child struggles with certain topics in WA3, there is still time to revise and strengthen those areas before the final exam.

Possible Topics Tested for Primary 5 Standard Mathematics

1. Decimals

Students may be tested on the four operations involving decimals, as well as converting measurements using decimals. This can include conversions such as:

• kilometres and metres
• metres and centimetres
• kilograms and grams
• litres and millilitres

They may also need to solve word problems involving addition, subtraction, multiplication and division of decimals.

2. Rate

Rate is about comparing one quantity with one unit of another quantity. Students may be asked to find:

• the rate
• the total amount
• the number of units

They may also need to solve word problems involving speed, cost per item, amount per hour, or similar situations.

3. Percentage

Percentage questions may include:

• expressing part of a whole as a percentage
• finding a percentage of a whole
• discount
• GST
• annual interest
• word problems involving percentage

This topic is especially important because percentage questions often appear in real-life contexts such as shopping, tax, savings and interest.

Example WA3 Questions We Have Practised

From the WA3 practice questions I have gone through with my 1-to-1 student, the questions are usually not just direct calculations. Many of them test whether the child can read the situation carefully and choose the correct method.

Here are some examples of the types of questions that came up in our WA3 practice:

Percentage Examples

• A student scores 48 out of 60 marks. What percentage of the total marks did the student score?
• A question shows a figure split into equal parts and asks what percentage is shaded.
• A shop gives a 20% discount on an item, and the student has to find the discount amount.
• A word problem gives the number of adults and children, then asks students to work out percentages after some people leave.

For percentage questions, the main skill is knowing what the “whole” is. Many students can calculate percentages, but they lose marks when they use the wrong total.

Rate Examples

• A printer prints 58 pages in 2 minutes. At the same rate, how many pages can it print in 6 minutes?
• A tap fills 160 litres of water in 20 minutes. How many litres flow in 1 minute?
• A typing question gives the number of words typed in 5 minutes and asks for the number of words typed in 1 hour.
• Taxi fare or parking charge questions may have a first block charge, followed by an additional charge for every next block.

For rate questions, students must be very clear about the unit. Is the rate per minute, per hour, per 100 g, per 400 m, or per item?

A Commonly Confusing Rate Question

From my experience with a student I am teaching 1-to-1, one type of rate question that can be confusing is the “first 100 g, thereafter every 100 g” type of question.

For example:

• First 100 g: $10
• Every 100 g thereafter: $5
• Total mass: 150 g

A common mistake is to think:

• First 100 g costs $10
• Remaining 50 g is half of 100 g, so it should cost $2.50
• Total cost = $12.50

But this is not the correct way if the question charges by the next 100 g block, or says “every additional 100 g or part thereof”. In that case, even though the remaining mass is only 50 g, it still counts as the next 100 g block.

So the correct cost is:

• First 100 g = $10
• Next 100 g block = $5
• Total cost = $15

This is a new concept for many Primary 5 students because they are used to proportional rate questions. In this type of question, the amount is not always split proportionally. Students must read whether the question is charging by exact amount, or by blocks.

A good tip is to ask:

“Do I divide the extra amount proportionally, or do I charge the next full block?”

If the question says “or part thereof”, “every additional block”, or gives a pricing table with fixed blocks, students should be careful not to simply divide the rate.

Decimal and Measurement Examples

• A question gives the total mass of 15 identical items in kilograms and asks for the mass of one item in grams.
• Measurement questions may require students to convert between kilograms and grams, metres and centimetres, or litres and millilitres.

For these questions, students should always check the unit required in the final answer. A child may calculate correctly but lose the mark because the answer is in kilograms instead of grams.

How Parents Can Help Their Child Prepare

Parents do not need to reteach every topic from scratch. Instead, they can help by making revision more focused.

Here are some useful steps:

1. Check the school’s official WA3 scope.
2. Review past worksheets and corrections.
3. Practise word problems regularly.
4. Revise formulas and key methods.
5. Do short timed practices.
6. Focus on careless mistakes.

Final Note

Primary 5 WA3 is a good opportunity for students to check their understanding before the final exam. The likely topics may include Decimals, Rate and Percentage for Primary 5 Standard Mathematics.

However, the actual WA3 2026 scope may vary across schools. Parents should always confirm with the teacher or school before planning revision.

The best preparation is not to do everything at the last minute, but to revise each topic step by step, practise word problems, and learn from mistakes before the final exam.