Introduction to Calculation Pen calculation is one of the most commonly used calculation methods in mathematics. Related calculation methods include mental calculation, oral calculation and so on. One of the teaching methods of mental arithmetic mathematics.

A calculation method based on thinking and language activities without any tools. It can cultivate students' quick calculation ability and develop their attention, memory and thinking ability.

The written calculation method should start from a single number and align the same number. If you add dozens, you will be promoted to a higher level; If the subtraction is not enough, 1 is taken from the high order as the sum of 10.

Numbers are added and then subtracted. Addition is one of the four basic operations, which refers to the calculation of combining two or more numbers and quantities into one number and quantity.

Pen computing extension

1, pen calculation is a method of writing formulas or calculating grass with a pen, and it is the most commonly used calculation method in mathematics. It usually involves basic arithmetic operation, fractional calculation, algebraic calculation and other mathematical contents.

2. Written calculation includes vertical calculation and horizontal calculation. Vertical calculation is a simple method of pen calculation, which has certain calculation procedures and processes, and is a commonly used algorithm in pen calculation teaching. Horizontal calculation depends on personal awareness of numbers, and requires understanding of estimation and oral calculation, as well as mastery of arithmetic rules and simple algorithms. Vertical calculation pays more attention to procedures.