Mathematical formula refers to the formula listed in the calculation number or algebra. In primary school, the horizontal formula of the four operations is listed as vertical calculation, which means that it is more convenient to list a vertical formula in the calculation process. And the sum of numbers is needed. Below the horizontal line, the sum should also be added horizontally.

Four operations refer to the mathematical formulas of addition, subtraction, multiplication and division, and refer to the formulas listed in numerical or algebraic calculations. The horizontal calculation of the four operations in primary school refers to the vertical calculation in the calculation process, which makes the calculation more convenient. And the sum of numbers is needed. Below the horizontal line, the sum should also be added horizontally.

Four operations refer to the calculation rules of addition, subtraction, multiplication and division. The advantage of column verticality is that it can be calculated clearly.