LESSON 40 SYNOPSIS (21 September – 27 September 2026)

23 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 40

This lesson builds foundation in Time, introducing students to reading clocks and connecting clock times to daily routines. Students begin reasoning about both the time shown and how long an activity lasts.

Learn how the hour hand and minute hand work together to show a time
Apply clock reading to write times in both “o’clock” and digital forms (e.g. 3:00)
Practise telling time to 5 minutes, noticing when the hour hand sits between two numbers
Introduce am and pm by linking times to morning, afternoon and evening events
Strengthen understanding of duration by comparing start and end times
Reinforce recognising one hour and half an hour as fixed lengths of time

Primary 2 Lesson 40

Under Volume 4, students learn to solve multi-step word problems involving volume in litres, where liquid is transferred, shared or used up. The focus is on structured methods for tracking how quantities change before and after an action.

Apply working forward to find amounts after a transfer, then use units to find the original volume
Learn to recognise that a transfer between containers keeps the total unchanged
Practise redistributing liquid so all containers end with equal amounts
Introduce working backwards to find the starting volume from equal groups and the amount left over
Strengthen reasoning about equal groups to find how much was used for each part
Reinforce drawing clear before-and-after comparisons to organise information

Primary 3 Lesson 40

Under Time 2, students move beyond reading clocks to solving multi-step word problems on duration. Problems involve start and end times, rest breaks, and comparing how long different tasks take.

Apply right angles to track how far the minute hand turns over a time interval
Learn to find duration from a starting and ending time, including across the 24-hour clock
Practise using part-whole thinking to remove a break from a total time span
Strengthen adding and subtracting durations in hours, minutes and seconds with regrouping
Reinforce comparison reasoning using difference to link the durations of several tasks
Consolidate using a bar model to organise sum-and-difference time problems

Primary 4 Lesson 40

Under Area & Perimeter 3, students tackle multi-step problems where shapes are linked through comparisons, folding and composite figures. The emphasis is on structured methods for working between area, perimeter and unknown sides.

Apply comparison of units to relate the perimeters of two shapes and find a missing side
Learn to use area comparisons across several shapes to work towards an unknown length
Practise reasoning from an area back to a side length of a square
Strengthen visualising folding to reconstruct the original shape and its perimeter
Reinforce breaking composite figures into squares and rectangles to find hidden lengths
Consolidate linking area and perimeter within one figure across multiple steps

Primary 5 Lesson 40

Select 13 is a revision lesson that integrates several P5 topics through challenging, multi-step problems. Students revisit whole numbers, geometry, money, volume, percentage and area, and practise choosing the right strategy for each question.

Apply systematic listing to find the least number of groups under fixed conditions
Strengthen use of angle properties and square areas in composite figures
Practise equal quantity and equal amount reasoning in money problems
Reinforce volume reasoning when containers are reshaped or turned upright
Consolidate percentage discount problems using sum and difference relationships
Apply the supposition method to find unknown quantities from a total cost

Primary 6 Lesson 39

Lesson 39 is the last lesson for Primary 6 for the 2026 academic year.