Understanding of numbers, clocks, graphs and simple addition and subtraction. Simple multiplication and division, understanding of length unit, identification of position and direction, understanding of angle. Comprehensive application of four operations, understanding of mass units, understanding and calculation of rectangles, and preliminary understanding of fractions. Parallelism and intersection, basic learning of statistics, understanding and operation of irregular figures, learning of multiples and factors.

Understand negative numbers and decimals, basic operations of decimals, understanding of equations, addition and subtraction of fractions. Fractional four operations, cognitive ratio, cylindrical cone learning, positive proportion and inverse proportion.