In mathematics, carry means that when adding decimal numbers, when the number on a certain bit is added to the multiple of 10 or 10, the number on carry will be added to 1. To put it more simply, it is to handle the carry of the previous digit when two adjacent digits are added.

For example, when calculating 17+26, the unit number is 7+6= 13. At this time, the decimal number is ten digits, and the original value of the decimal number is 1, that is, 1 in 7+6= 13 is added to the value of the decimal number, and the decimal number will become 3, and finally.

The application scenario of carry is not only addition calculation, but also other mathematical operations and programming. In subtraction, borrowing is the inverse operation of carry, and in addition and subtraction of binary numbers, carry operation is also needed.

Carry also has an important application in programming. For example, in a computer, numbers are stored and processed in binary form, and carry has become an indispensable part of binary operation.

The significance of carry is that it helps us to complete important operations in mathematical calculation and plays an important role in the field of programming. It involves not only the basic knowledge of numbers, but also more profound mathematical concepts and algorithms in computer science. Carry plays an important role in modern mathematics, physics, engineering and many other fields. Understanding the concept and principle of carry numbers will help students to lay a solid mathematical foundation and help people engaged in computer-related occupations to better master relevant knowledge.