Circles and Pythagoras

Sent from my iPhone

P5, P6 geometry construction

Sent from my iPhone

Interesting recurrence of “142857” when numbers are divided by 7

Sent from my iPhone

P5, P6 area and perimeter

____

Sec2 trigonometry

Sent from my iPad

P6 Money, Profit (H: area diagram ?)

___

Sent from my iPhone

P6 Ratio, Percentage (Assessment book specimen paper)

P5, P6 money (H: Area Diagram)

_____ my solution

Sent from my iPhone

Advice to my students sitting for PSLE Mathematics

Try to follow these guidelines: - 1-mark question to be done within 1minute, 2-mark question within 2 mins, so as to eke out time for 3-mark and above questions - ⁠Apply RSVP for questions involving geometry and diagrams/tables/graphs/piecharts - ⁠Draw models or do story-boarding when encountering word problems with fraction, ratio, percentage

p5 p6 geometry

Sent from my iPhone

P6 numbers, multiples (H: area diagram)

Sent from my iPhone

P5 order of operations

Most people get this wrong on the first try. 

     72 ÷ (8 + 4) × 6 − 9 

____

Why is it so? 

One reason is based on the misconception that multiplication has higher ranking than division. 

Another is when people have only a partial understanding of order of operations. While they know that / and x have the same rank, and ought to operate from left to right, they are nevertheless affected by a phenomenon I coined as “the luring of numbers”: given that 12x6=72, and 72/72 will “conveniently” yield 1 for the result of the first 4 numbers (in turn resulting in a wrong final answer of -8) , when it ought to be 36 (where final answer should be 27)

P5 numbers, multiples, decimals, area of triangle, perimeter, pattern

Sent from my iPhone

2026 PSLE Math format

https://isomer-user-content.by.gov.sg/334/fe51f29b-04ae-4fcb-a907-8db04c028510/0008_y26_sy.pdf

Sec1 Algebra

Sent from my iPhone

Sec3 Sec4 Geometry (cyclic quad and angle at centre = 2x angle at circumference)

____ my solution

Sent from my iPhone

Application of Pythagoras Theorem

Sent from my iPhone

P6 circles

_______ my solution 5r = 66-3x2 = 60 r =60/5=12 (a) Breadth of garden= (2+12)x2=28 m (b) area of path = 2x14 + 5 x 1/4 x 3.14 x (14x14 - 12x12) = 28 + 5x40.82 = 232.1 m2

Pattern

Advanced algebra and expressions

Sent from my iPhone

P5, P6 decimal (H: area diagram)

______ My solution:

Sent from my iPad

math functions — with sound effects! 🤗

Numbers in relation to our lifetime ( Significance of numbers in our lives )

How many moments (seconds) have we lived? 🤔

For a centenarian, his/her heart would have beaten  3 153 600 000 times (read as "That number is three billion, one hundred fifty-three million, six hundred thousand.) ie. 3 billion times in 1 lifetime.

Internet speed is in the range of 500 Mbps (500 000 000 bits per second) or 10 Gbps (10 000 000 000 bits per second) 

P6 Ratio (H: area diagram cum algebra)

____

Sent from my iPhone

P5 P6 numbers . H: Area Diagram

Sent from my iPhone