"Application of linear equations of two variables - Numbers on milestones" PPT teaching courseware of linear equations of two variables

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"Application of linear equations of two variables - numbers on milestones" PPT teaching courseware for linear equations of two variables, 12 pages in total.

Part One Content: Basic Knowledge Key Points

Knowledge points: solving word problems of linear equations in two variables

1. A car starts from point A and drives eastward, passing through intersection B on the way. Within a specified period of time, if the vehicle speed is 60 kilometers per hour, it can drive 2 kilometers past intersection B; if every Traveling 50 kilometers per hour, there is only a shortfall of 3 kilometers to reach point B. Suppose the distance between A and B is x kilometers, and the prescribed time is y hours, then the system of equations (C) can be listed

2. (Adapted) It is known that two people A and B are in two places 18 kilometers apart, and the speed of A is greater than the speed of B. If two people start walking towards each other at the same time, they will meet each other after 2 hours; if two people go in the same direction Okay, and A sets off 1 hour before B, then A catches up with B 4 hours after B sets off, find the speed of A and B. Suppose A's speed is x kilometers/hour, and B's speed is y kilometers meters/hour, then the system of equations that can be formulated is (A)

Numerical PPT on the milestones of applying linear equations of two variables, part 2: improvement of comprehensive capabilities

7.5 kilograms of betel nut and 7 kilograms of puzzle were sold for 171 yuan, and 8 kilograms of betel nut and 9 kilograms of puzzle were sold for 234 yuan. Find the yuan of 1 kilogram of betel nut and 1 kilogram of puzzle. Let 1 kilogram of betel nut be x yuan, and 1 kilogram of profit Wisdom is y element, and the system of equations that can be formulated is (A)

8. Xiaoying's home is 1200 meters away from the school, one section of which is uphill and the other is downhill. It takes her 16 minutes to go to school. Assume that Xiaoying's average speed when going uphill is 3 km/h and her average speed when going downhill is 5 km/h. If Xiaoying takes x minutes to go uphill and y minutes to go downhill, then according to the question, the equation group can be (B)

Numerical PPT on the milestones of applying linear equations of two variables, the third part: Expanding exploration and breakthroughs

14. A middle school will organize a one-day spring outing for seventh grade students. Teacher Wang and classmates A and B will go to a bus rental company to discuss car rental matters.

(1) Two students asked the company manager about the price of renting a car. The company manager told them: "The company has two models of buses, 45-seater and 60-seater, available for rent. The daily rental price of a 60-seater bus is higher than that of a 45-seater bus." It is 100 yuan more expensive." Teacher Wang said: "The eighth grade of our school rented five 45-seater and two 60-seater buses from this company yesterday. The daily rent was 1,600 yuan. Do you know that the 45-seater and 60-seater buses cost 1,600 yuan per day? How much is the daily rent for each bus?" Two students, A and B, thought for a while and said they knew the price. Are you smart enough to know how much the daily rental for a 45-seater and 60-seater bus is?

(2) The company manager asked: "How are you going to rent a car?" Classmate A said: "My plan is to rent only a 45-seat bus, but there will be a bus with 30 seats available." Classmate B said: "My plan is It is to rent only a 60-seater bus, which is exactly full and uses two fewer buses than Student A's plan." Teacher Wang listened to their conversation and said, "From an economic point of view, are there any other plans?" If It’s you, how should you design a car rental plan and explain why.

Keywords: Free download of Beijing Normal University version of eighth-grade math PPT courseware for the first volume, PPT download of milestones in applying linear equations of two variables, PPT download of linear equations of two variables, .PPT format;

For more information about the PPT courseware "Numbers on Milestones of Applying Linear Equations of Two Variables to Systems of Linear Equations of Two Variables", please click on the Numbers PPT tag on Milestones of Applying Linear Equations of Two Variables to Linear Equations of Two Variables.

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Update Time: 2024-09-30

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