1. Create concrete and vivid life situations and guide students to find and ask additional questions from the situations.

2. In the process of trying to calculate, encourage students to think independently, provide opportunities for students to exchange ideas through cooperative learning, and let students choose their own methods through communication. The purpose is to show the process of students' exploration and encourage the diversification of algorithms.

Carry addition, one of mathematical operations, one of addition. For example, in decimal system, if the number of digits on one digit adds up to ten, then write the number of digits added up on this digit and input the number on the tenth digit to the next digit.

Even in advanced mathematics, carry will appear. Carry is an important function of adding circuit in calculation.

For example, if the number of digits reaches 10, the number will move forward by 1 to become a ten.

In the decimal algorithm, if every digit is full ten, add1to the decimal digit; When there are ten people to ten, add one to a hundred.

In the binary algorithm, every bit is full two, and ten bits are added1; Ten people reach two, and one is added to a hundred.

Carry addition formula