The calculation method is as follows: Xiaohong climbs to the fourth floor and Xiaoming climbs to the third floor. Because the first floor itself is the first floor, it is actually three floors and two floors, and the speed ratio is 3: 2, which can be understood as Xiaohong's speed is 1.5 and Xiaoming's speed is 1. Xiaohong's distance is 9 floors (minus the first floor itself), so Xiaoming's floor should be 9/ 1.5* 1+ 1 (first floor) =7 floors.
Math grading skills:
1, form good habits.
When to do homework every day, such as when to do Chinese homework, when to do math homework and when to practice English, rules and habits should be formed. With good habits, you can do your homework automatically at a fixed time, and you can concentrate on your homework and improve your effect, so you won't easily squeeze out the time to do your homework.
2. Get ready.
Get ready. Make material preparations first, that is, prepare textbooks, reference books, exercise books and stationery. The second is mental preparation, that is, think about what classes you took that day, what is the difficulty of each class, do some homework in several classes, and then arrange the order of doing homework according to the principle of easy before difficult.
3. Review before doing your homework.
Before doing the homework of each course, review the course, get familiar with the definition, concept and principle of the course of the day, and think about the relationship between the homework questions of the day and the content of the class, so as to be aware of it. Then use this knowledge to do homework, and deepen the understanding and consolidation of this knowledge through doing homework. If you pick up your homework and do it, it is easy to make mistakes, waste more time and affect the effect of doing your homework.