1. Addition and subtraction: The places where pupils are prone to make mistakes in addition and subtraction are carry and abdication, borrowing and returning. Especially in the addition and subtraction of multi-digits, it is easy to ignore carry or abdication, which leads to calculation errors.
2. Multiplication and division: Pupils are prone to make mistakes in multiplication and division, including the memory of multiplication formulas, multiplication and division relations, and multiplication and division of decimals. Especially in the multiplication and division of multi-digits, it is easy to ignore the position of decimal point, which leads to calculation errors.
3. Conversion of fractions and decimals: The places where pupils are prone to make mistakes in the conversion of fractions and decimals include the simplification of fractions and the approximation of decimals. Especially when converting fractions and decimals, it is easy to ignore the position of decimal point, which leads to calculation errors.
4. Calculation of area and volume: The mistakes in calculating area and volume of primary school students include unit conversion and the application of calculation formulas. Especially when calculating the area and volume of irregular figures, it is easy to ignore special circumstances and lead to calculation errors.
5. The nature of geometric figures: The places where pupils easily make mistakes in geometric figures include the nature of triangles, quadrilaterals and circles. Especially in the classification and judgment of geometric figures, it is easy to confuse different properties and lead to judgment errors.