7x5+9=35+9=44 (yuan), 7+9X4=7+36=43 (yuan). Because 44 yuan is better than 43 yuan, renting a small boat and four big boats saves money.
In the problem of chartering, it is easy to find that it is the easiest to calculate if you only choose to rent a big boat or directly choose to rent a small boat, and I believe there is not much problem in the calculation process. According to the number of people and the number of people currently carried by each ship, this problem-solving idea can easily solve this part of the problem, and the difficulty is not great.
Application problem is to describe relevant facts in language or words and reflect some mathematical relationship (such as quantitative relationship, positional relationship, etc.) ) and solved an unknown number of problems. Each application problem includes known conditions and problems.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.