IGCSE Add Math

Petaling Jaya · Functions

Functions Tutoring for PJ IGCSE Add Math Students

Rig, founder of IGCSE Add Math Malaysia

Written by Rig, our founder

8 years teaching IGCSE & SPM maths · Updated 19 August 2026

Functions arrives early in 0606, and for Petaling Jaya students on a compressed timetable it is where solid understanding still bleeds marks to rushed notation. Functions, composite and inverse, domain and range, and modulus, runs through the whole paper, and the exam is strict about how the answer is written. When a school is moving fast, the notation habits that protect marks are the first things to get skimmed.

The habits a fast class skips

The lost marks here are habits, not gaps in understanding:

  • Composite order: fg(x)fg(x) means gg first, then ff. Under time pressure students reverse it.
  • Inverse functions: the swap-and-rearrange is easy; the domain of the inverse is the separate mark that gets forgotten.
  • Range and one-one: why a domain must be restricted before a function can be inverted.

A specialist catches each the moment it lands on the page, which is how a rushed habit gets replaced by a reliable one.

PJ logistics, taught online

In a busy SS2 or Damansara group class, a notation habit is reinforced rather than corrected, because the tutor can’t watch every page. Online 1-to-1 puts a specialist on your child’s actual working, marked against the mark scheme, with no commute a time-pressed PJ student can’t spare.

Classes are RM80–90/hr in 1.5-hour sessions with a founder-vetted tutor. Start with a 1-hour trial class. Message us on WhatsApp with your child’s school and year.

More: Functions notes · worked functions examples · PJ tutoring guide.

Common questions

My child understands functions but keeps losing marks. Why?
It's almost always notation discipline rather than understanding, and a fast school timetable makes it worse because the careful habits get skipped for speed. The marks go on reversed composite order and unwritten inverse domains. These are quick to un-learn once every line a student writes is seen and corrected, which is exactly what a compressed class can't do for each student.
Is functions worth spending a session on when we're short of time?
Yes, because the habits it teaches protect marks across the whole paper, not just the functions questions. Composite order and domain discipline show up in graph work, calculus and inverses throughout 0606, so an hour spent tightening functions pays back in several later topics, which is good value for a student racing the clock.

Keep going

Online Add Math tutor in Petaling Jaya

The full city guide

Functions: topic notes

The method in full

Functions worked examples

See it solved

Book the trial class

1 hour, no package

See the teaching work on your own child. Then decide.

Every student starts with a 1-hour trial class taught by the vetted tutor your child would actually have. Real teaching, a diagnostic on real exam questions, and a straight answer on the gap to target. One hour at your tutor's rate (RM80–90/hr), no package and no deposit, and you decide afterwards whether to book a weekly slot. Online anywhere in Malaysia.

Book a Trial Class How the trial works