LESSON 38 SYNOPSIS (7 September – 13 September 2026)

08 September 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 38

This lesson builds foundation in Division, introducing the two core ideas behind splitting a group of objects: equal sharing and equal grouping. Students learn to read simple real-world scenarios and work out unknown quantities using pictorial support.

Learn to distinguish between equal grouping (finding number of groups) and equal sharing (finding value in each group)
Apply counting and matching strategies to work out unknown totals from visual representations
Practise translating word problems into simple division situations
Strengthen recognition of key phrases such as “shared equally” and “put into groups of”
Consolidate identifying the total, the number of groups, and the value per group in each problem
Reinforce careful reading before choosing a solving approach

Primary 2 Lesson 38

This lesson builds foundation in Volume 2, guiding students through increasingly complex chains of capacity relationships involving containers, jugs, and tanks.

Learn to convert between related capacities using a chain of equal groups, moving from litres to millilitres
Apply repeated division to find the value of a single unit after multiple rounds of grouping
Practise multiplying across three or more linked containers to find a final total volume
Strengthen use of part-whole thinking to find a missing part of a known whole capacity
Consolidate finding the whole first before subtracting a known part in multi-step problems
Reinforce careful sequencing when a problem involves more than one conversion step

Primary 3 Lesson 38

This lesson builds foundation in Area & Perimeter 2, extending students from single shapes to composite figures and unit comparisons.

Learn the push-out method to reshape irregular figures into simple rectangles for finding perimeter
Apply figure segmentation to break composite shapes into calculable rectangular parts for area
Practise finding the perimeter or area of one identical unit when several equal shapes form a larger figure
Strengthen use of length-breadth ratios to work out one unit’s value from a given perimeter
Consolidate combining ratio and perimeter facts to determine an unknown area
Reinforce counting unit squares accurately when finding area and perimeter of polyominoes

Primary 4 Lesson 38

This lesson builds foundation in Area & Perimeter 1, moving students from working out unknowns for single squares and rectangles into interpreting composite shapes.

Learn to work backwards from a given area or perimeter to find an unknown side length
Apply the relationship between length and breadth to solve reverse area and perimeter problems
Practise counting unit squares accurately to find area in irregular polyomino figures
Strengthen careful reading of composite figures without assuming unlabelled side lengths
Consolidate the cut-and-paste method to reposition irregular edges into a calculable rectangle
Reinforce identifying which given lengths are actually needed for each composite perimeter question

Primary 5 Lesson 38

This is a Select lesson — a revision lesson mixing multiple problem-solving methods without labels, requiring students to first identify the right approach.

Select 12 revises a wide span of upper-primary heuristics, testing whether students can independently recognise which method to apply.

Learn to identify hidden difference and excess-and-shortage structures within worded number problems
Apply before-and-after comparison to trace changes in quantity across two time points
Practise the gap-and-interval method for spacing objects along a fixed distance
Strengthen part-whole reasoning to isolate individual item costs or masses from combined totals
Consolidate rate-based thinking to compare money or resources spent over time
Reinforce angle properties in parallelograms and trapeziums, alongside area-based percentage reasoning

Primary 6 Lesson 38

PSLE Revision 10 consolidates high-level reasoning across geometry, algebra, and rate-based problem types typical of the actual PSLE paper.

Learn to apply angle properties involving parallel lines to solve multi-step geometry questions
Apply rate reasoning to tanks with simultaneous inflow and outflow of water
Practise reverse percentage method to recover an original salary or price from a known change
Strengthen algebraic representation, expressing unknown costs in terms of a variable
Consolidate ratio and proportion thinking across shapes involving squares, circles, and shaded regions
Reinforce volume displacement reasoning when solid objects are removed from a filled tank