think! Mathematics Primary Singapore Edition Workbook 4A is a series of textbooks and workbooks written to meet the requirements for Singapore's latest curriculum.  Written in accordance with extensively researched approaches used in Singapore, it adopts a spiral design with the integration of the concrete-pictorial-abstract (C-P-A) approach, careful variation and the use of problem solving, which are integral features of the learning process. 
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Based on time-tested learning theories, this series incorporates the use of concrete manipulatives and group work.  In think! mathematics Singapore Edition, these features are exemplified throughout the series.
 
Chapter One Numbers to 10 000
Chapter Two Additon & Subtraction Within 10 000
Chapter Three Multiplication and Divison
Chapter Four Fractions
Chapter Five Word Problems
Chapter Six Lines and Angles