1, addition: indicated by the symbol "+",indicating the sum of two numbers. For example: 2+3 = 5.
2. Subtraction: represented by the symbol "-",which means the difference obtained by subtracting one number from another. For example: 5-2 = 3.
3. Multiplication: represented by the symbol "×" or "*", indicating the result of multiplication of two numbers. For example: 2 × 3 = 6.
4. Division: indicated by the symbol "⊙" or "/",indicating the quotient obtained by dividing one number by another. For example: 6 ÷ 2 = 3.
5. Equal: indicated by the symbol "=", indicating that two numbers or expressions are equal. For example: 2+3 = 5.
6. greater than, less than and not equal to: greater than with the symbol ">;" The symbol "2,4 <; 6,5 ≠ 3。
7. Brackets: represented by symbols "("and ")", for example, (2+3) × 4 = 20.
8. Square root: indicated by the symbol "√", indicating the square root of a number. For example: √9 = 3.
9. Exponent and power: represented by the symbol "",indicating the exponent or power of a number. For example: 2 3 = 8, which means that the third power of 2 is equal to 8.
10, percent sign: indicated by the symbol "%",indicating the result of dividing a number by 100. For example: 25% = 0.25.
Matters needing attention in mathematical operation
1, priority: Mathematical operations have a certain priority, usually the priority of multiplication and division is higher than that of addition and subtraction. If there are no brackets, they should be calculated in priority order to ensure the correct result.
2. Use of symbols: It is very important to use correct symbols between operators. For example, use fractional lines instead of slashes in scores; In exponential operation, the symbol ""should be used to represent power operation, not "* *" or other symbols.