Vertical calculation refers to a vertical calculation in the calculation process, which makes the calculation simple. In addition calculation, the same numbers are aligned. If the sum exceeds 10, it will move forward to 1. When subtracting, the same numbers are aligned. If it is not enough, borrow 1 from the last digit as 10. Vertical calculation, seemingly complicated, actually contains the beauty of logic and accurate formulas.

Vertical calculation is simply to express the calculation process of number addition, subtraction, multiplication and division in vertical form. This calculation method is not only intuitive, but also can effectively improve the calculation accuracy. It is undoubtedly a very useful tool for us former students.

I remember the first time I came into contact with vertical calculation, it was in the math class of primary school. Vivid and interesting ways show us how to use vertical addition, subtraction, multiplication and division. From then on, I began to understand that vertical is not only a way to express poitiers's mathematical operation, but also a logical and skillful calculation tool. Like a bright lighthouse, it illuminates our way to explore the mathematical world.

Vertical calculation is not only a mathematical skill, but also a way of thinking. It is not only a ladder for us to learn mathematics, but also a tool for us to explore the world and understand things. Vertical computing is a very valuable asset. It not only gave me the knowledge of mathematics, but also gave me the ability to solve problems and the spirit of independent thinking.

Calculation of multiplying 3 digits by 2 digits

123x45、234x56、345x67、456x78、567x99

678x90、789x0 1、890x 12、90 1x23、 102 x34；

1 13x45、 124x56、 135x67、 146x78、 157 x89；

168x90、 179x0 1、 180x 12、 19 1x23、202x34。