LESSON 15 SYNOPSIS (30 March – 5 April 2026)

31 March 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 15

This lesson builds foundation in Numbers to 20 through the Part-Whole concept. Students learn to handle simple word problems by identifying known parts, the whole, and what is missing.

Learn to organise information into part-whole relationships.
Apply addition to find a total from two or three parts.
Practise subtraction to find a missing part from the whole.
Strengthen the habit of checking what is known and unknown.
Reinforce clear number sentences that match the story.

After this lesson, students will be better able to model basic word problems accurately and choose whether to add or subtract, supporting later multi-step problem solving.

Primary 2 Lesson 15

Mass 1 builds foundation in how students interpret and compare mass using both g and kg. The lesson trains students to move beyond guessing by reading scales carefully, identifying equal intervals, and using comparison logic to decide which object is heavier or lighter.

Learn to estimate whether g or kg is reasonable.
Apply interval thinking to read weighing scales accurately.
Practise breaking scales into equal units before counting.
Strengthen comparison using heavier/lighter relationships.
Reinforce ordering objects from given mass clues.
Consolidate transitive reasoning across several objects.

Students will be better able to read, compare, and order mass systematically in later measurement problems.

Primary 3 Lesson 15

Money 5 builds structured comparison within a money context. Students learn to interpret how totals, equal units, and fixed differences work together so they can solve larger comparison problems systematically, not by guesswork.

Learn to convert statements into units and differences.
Apply grouping to find the value of one unit.
Practise adjusting totals before dividing into equal parts.
Strengthen comparison across three quantities with mixed information.
Introduce stacking models to combine repeated equal values.
Reinforce clear model organisation before calculation.

By the end of the lesson, students can select and apply unit-based comparison methods confidently in more advanced money word problems.

Primary 4 Lesson 15

Under Fractions 2, students learn to interpret fractions as relationships between parts, totals, and equal units. The lesson builds on earlier fraction work by training students to convert fractional statements into structured models that can be used to solve more complex word problems accurately.

Learn to treat fractions as values linking one quantity to another.
Apply fraction models to find unknown amounts from a given total.
Practise identifying how many units make up the whole.
Strengthen division first, then multiplication, when finding missing values.
Introduce changing denominators while keeping relationships consistent.
Reinforce careful organisation of grouped and remaining parts.

Students will be better able to model multi-step fraction problems systematically, supporting stronger performance in higher-order problem solving.

Primary 5 Lesson 15

Under Volume 1, students build foundation in finding the volume of cuboids and cubes. The lesson focuses on linking dimensions, base area, and space occupied, so students can handle both direct and missing-dimension problems systematically.

Learn to apply length × breadth × height to solids.
Practise finding unknown length, breadth, or height from volume.
Reinforce conversion between litres and cm³ in tank problems.
Strengthen recognition of cube structure through equal edge lengths.
Apply unit-cube counting to model hidden layers and total space.

Students will be better able to interpret 3D measurement problems accurately, supporting later work in volume, nets, and composite solids.

Primary 6 Lesson 15

Under Circles 2, students extend work on circles into composite figures made from rectangles, squares, semicircles and quadrants. The lesson trains them to decide which straight lengths and curved parts belong, and to use equal elimination to uncover missing radii or areas.

Learn to trace composite perimeter without double-counting hidden edges.
Apply circle measures within squares and rectangles.
Practise separating area into known and removed parts.
Strengthen use of radius, diameter, and arc relationships.
Introduce equal elimination to compare figures and remove common parts.

After this lesson, students can handle harder PSLE-style circle problems with more structure and accuracy.