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Think! Mathematics Secondary Textbook 2A (8th Ed)


think! Mathematics is a series of textbooks designed to provide students valuable learning experiences and a deeper appreciation of mathematics by engaging their minds and hearts. The series covers the MOE Syllabus for Mathematics implemented from 2020, and reflects the  important shifts towards the development of 21st century competencies. Underpinning the writing of this textbook is our belief that all students can learn and appreciate mathematics.  This textbook series will be a meaningful companion for students as they embark on an exciting journey in secondary school mathematics through collaborative and self-directed learning.

Special features

  • Chapter Opener and Introductory Problem motivate the development of concepts
  • Investigation, Class Discussion, Thinking time, Journal Writing and Performance Task highlight mathematics as a tool and as a discipline 
  • Real-life examples, applications and Problems in Real-World Contexts emphasise the relevance and beauty of mathematics
  • Worked Examples, Practise Now and Exercise questions ensure a high baseline of mastery
  • Challenge Yourself problems provide extension opportunities
  • Reflection prompts encourage metacognition
  • ICT tools promote visualisation and exploration of concepts
  • Invitation to Code and Opportunities to code expose students to this increasingly prominent skill of the future
  • Looking Back and Summary consolidate the big ideas, concepts and knowledge encountered in each chapter


  1. Linear Graph and Simultaneous linear equation
  • Equation of straight lines
  • Graphs of linear equations in the form ax + by = k
  • Solving simultaneous linear equations using graphical method
  • Solving simultaneous linear equations using algebraic method
  • Applications of simultaneous equation in real world context


  1. Linear inequalities
  • Simple inequalities
  • Solving simple linear inequalities
  • Solving problems involving linear inequalities
  1. Expansion and factorisation of algebraic expressions
  • Addition and subtraction of quadratic expressions
  • Expansion of algebraic expressions of the form (a + b ) (c + d)
  • Expansion of quadratic expressions
  • Factorisation of algebraic expression into the form (a + b)(c + d)
  1. Expansion and factorisation using special algebraic identities
  • Expansion using special algebraic identities
  • Factorisation using special algebraic identities
  1. Quadratic Equations and Graphs
  • Solving quadratic equations by factorisation
  • Quadratic function and graphs
  1. Algebraic fractions and formulae
  • Algebraic fractions
  • Multiplication and division of algebraic fractions
  • Addition and subtraction of algebraic fractions
  • Solving equations involving algebraic fractions
  • Manipulation of algebraic formulae
  1. Direct and inverse proportions
  • Direct Proportion
  • Algebraic and graphical representations of direct proportion
  • Other forms of direct proportion
  • Inverse proportion
  • Algebraic and graphical representation of inverse proportion
  • Other forms of inverse proportion

Complete series contain:

  1. Textbook
  2. Workbook