The Secondary One (Special/Express) Mathematics Syllabus covers topics in arithmetic including whole numbers, fractions, decimals, approximation, estimation, and use of a scientific calculator. It also includes squares, square roots, cubes, cube roots and number sequences. Key areas of focus are the four arithmetic operations, ordering of numbers, factors and multiples, and rounding numbers to a specified degree of accuracy. The syllabus aims to develop students' conceptual understanding and skills in calculating with whole numbers, fractions, decimals and real numbers.