First, introduce the concept of time. First of all, we need to introduce the concept of time to make students understand what minutes and seconds are. Through the demonstration of the clock, let the students understand that the passage of time is even and every minute is equal.

Second, learn the conversion of minutes and seconds. Next, you need to teach the conversion relationship between minutes and seconds. For example, 1 minute equals 60 seconds, and this conversion relationship can be calculated by simple multiplication. Ask the students to do some simple exercises, such as: How many seconds is 3 minutes? Through the conversion relationship that 1 minute equals 60 seconds, it is easy to get that 3 minutes equals 180 seconds.

Third, teach the addition and subtraction of time. Once students understand the conversion relationship between minutes and seconds, they can begin to introduce the addition and subtraction of time. The addition and subtraction of time is similar to the addition and subtraction of ordinary numbers, but the conversion relationship of hours, minutes and seconds needs to be considered.

Fourth, practical application. Students' understanding of time calculation can be consolidated through some practical application problems. For example, you can ask students, "If you need to complete a task in 2 hours and 30 minutes, but it actually took you 2 hours and 20 minutes, how many seconds do you need to complete the remaining tasks?" You can get the answer: "120 seconds".

Advantages of learning mathematics

People who are good at math are relatively smart and savvy, and they can show their advantages in dealing with people. The faster you think, the more ways and ideas you have. Mathematics is the foundation of other disciplines, and it is easier for people who learn mathematics well to get into other disciplines. Learning software, computer, finance and other engineering majors is even more handy.

It is used everywhere in life. Nowadays, the society is an information society, and mathematical knowledge is used in financial management and computers. Mathematics can cultivate people's integrity and honesty. Mathematics pays the most attention to convincing people by reasoning, and only believes in the results of logical reasoning. Mathematics can be used to cultivate people's tenacity and courage. Mathematics can cultivate people's overall consciousness. Mathematics can cultivate people's good character.