LESSON 25 SYNOPSIS (8 June – 14 June 2026)

08 June 2026

At Matrix Math, we provide an engaging and detailed learning experience for your child. Matrix Math Tuition programme focuses on essential concepts that will further strengthen their mathematical foundation. The lesson synopsis gives parents a clear preview of the topics and problem-solving skills that will be covered in class. At Matrix Math, we ensure that each lesson is designed to build confidence and mastery in math, preparing students for success in both school and beyond.

Primary 1 Lesson 25

This lesson builds foundation in Numbers to 40 L4, focusing on comparison word problems involving two quantities. Students work through problems where they must identify whether they are finding a bigger group, smaller group, or difference — a critical decision-making step before computing.

Learn to interpret more than and less than language to determine which quantity is larger or smaller
Apply the bigger group / smaller group framework to classify what the question is asking before choosing an operation
Practise finding the bigger group by adding the difference to the known quantity
Practise finding the smaller group by subtracting the difference from the known quantity
Strengthen find the difference reasoning by subtracting the smaller from the larger quantity
Consolidate the habit of asking “What am I finding?” before selecting addition or subtraction

Primary 2 Lesson 25

This lesson builds foundation in Money 2, focusing on multi-step problems where the unit price must be derived before calculating a total. Students work through increasingly complex grouping and regrouping scenarios.

Learn to find an indirect unit value by adjusting a known price using more than / less than before multiplying
Apply repeat application reasoning — finding the cost of one unit first, then scaling to a new quantity
Practise regrouping once by converting a grouped price into a unit rate, then multiplying by a new group count
Strengthen regrouping twice by computing costs for two different items separately, then combining totals
Consolidate the habit of identifying the unknown unit before deciding which operation to apply first

Primary 3 Lesson 25

This is a revision lesson consolidating key P3 topics across Select 6. Students revisit problem types spanning heuristics, geometry, and multi-step reasoning in preparation for assessment.

Reinforce before-and-after reasoning by tracking a quantity through spending and shortfall to find an original amount
Apply ratio and multiples thinking to distribute a total across three related quantities using proportional units
Practise the supposition method by assuming all animals have the same number of legs, then adjusting for the difference
Strengthen equal transfer reasoning to find a total when a quantity is redistributed to create equal groups
Consolidate multi-step problems requiring sequential operations — subtract, then divide — across a single scenario
Reinforce identification of parallel and perpendicular lines in geometric figures and letter forms

Primary 4 Lesson 25

This is a revision lesson consolidating key P4 topics across Select 6. Students revisit multi-step problem types spanning algebra-readiness, measurement, and geometry.

Reinforce equal distribution reasoning by working backwards from a fixed total to find an unknown group size
Apply before-and-after thinking with transfers, using the new ratio to determine original amounts
Strengthen simultaneous comparison by linking two separate totals through a shared quantity to isolate an unknown
Practise shortfall and excess reasoning to find a unit price and original amount from two buying scenarios
Consolidate LCM reasoning to find when repeating events coincide — a common P4 heuristic question type
Reinforce ratio and proportion by scaling a known recipe or mixture to a new target quantity
Apply protractor skills to construct angles accurately on a straight line

Primary 5 Lesson 25

This is a revision lesson consolidating key P5 topics across Select 7. Students revisit complex multi-step problems demanding systematic reasoning across quantities, costs, and geometry.

Reinforce part-whole with conditions — setting up units from multiple simultaneous constraints before solving
Apply equal transfer reasoning to redistribute quantities between parties and satisfy a new ratio condition
Strengthen simultaneous equations thinking by equating total cost expressions to isolate a single unknown
Practise before-and-after with age problems, including expressing one quantity as a fraction of another at a different point in time
Consolidate shortfall and excess reasoning across two purchasing scenarios to determine unit price and original amount
Reinforce LCM-based regrouping by recognising that a fixed total repacked into different group sizes produces a predictable change in box count

Primary 6 Lesson 25

This lesson builds foundation in Average 2, focusing on problems where the average changes because of missing values, added items, or removed items. Students learn to reason backwards from an average to find unknown quantities.

Learn to find the largest possible difference between two unknown values by maximising one and minimising the other within given digit constraints
Apply smallest possible difference reasoning by distributing the required total as evenly as possible across two unknowns
Strengthen redistribution with same number of groups — using the change in average to find the total added or removed
Practise redistribution with increase in groups by working backwards from a new average when one item is added
Consolidate redistribution with decrease in groups by reasoning from a higher average after an item is removed