Introduction to Number for GCSE(9-1)/IGCSE Mathematics

Understand types of numbers, fractions, decimals and percentages for GCSE and IGCSE Maths
Rating: 4.4 out of 5 (88 ratings)
3,931 students
English [Auto]

Identify the different types of numbers
How to add/subtract/multiply and divide fractions
Convert fractions into decimals
Convert decimals(both recurring and non-recurring) into fractions
Multiply and divide decimals with ease
Change percentage of something into an amount
Work out the original price of something given price after discount
Calculate percentage increase or decrease


  • Completed Key Stage 3/Year 9 Maths
  • Be comfortable with basic arithmetic


A good understanding of the Number part of the GCSE/IGCSE syllabus is key to getting a good grade in these exams.  Even though its a significant part of the exam and a foundation for other parts of the syllabus sometimes students struggle with it. Hopefully after taking this free introductory course some of those struggles will be a thing of the past

 This course will teach you how to

  • Recognise the different types of Number
  • Handle fractions with ease
  • Convert between fractions, decimals and percentages
  • Apply percentage increase and decrease
  • Tackle GCSE/IGCSE level exam problems in Fractions, Decimals and Percentages

Who this course is for:

  • Students studying GCSE or IGCSE Mathematics
  • People who want to improve their understanding of fractions, decimals or percentages

Course content

2 sections12 lectures1h 11m total length
  • Course Overview
  • Number Types
  • Quiz - Number Types
    5 questions
  • Basic Operations - Addition
  • Basic Operations - Subtraction
  • Basic Operations - Multiplication
  • Basic Operations - Division
  • Fractions
  • Quiz - Fractions
    5 questions
  • Decimals
  • Quiz - Decimals
    5 questions
  • Percentages
  • Quiz - Percentages
    4 questions
  • Exam Style Question Review
  • End of Course Test
    10 questions
  • Course Summary


Elite Maths Tutor
Michael Siva
  • 4.5 Instructor Rating
  • 108 Reviews
  • 7,152 Students
  • 2 Courses

I have been a Maths tutor for 20+ years and currently work in tech. I am really passionate about helping students achieve their full potential in Maths, Science and Tech subjects and dispelling the notion that you have to be particularly bright or intelligent to be good at Maths and Science subjects.

My own academic background is a bit unusual, I got BSc in Physics/Electronics aged 16 and my MSc from Imperial College aged 19.

In my spare time I am always looking for better ways to teach maths and science but I also like fitness bootcamp classes, action movies and going for walks with my family in and around South West London and Surrey near where I live.