Today, we will continue to do the AMC8 past papers of previous years, and experience how to solve the problems of the knowledge we have learned through high-quality past papers, and establish a strategy of thinking quickly and doing the right questions.
The five questions shared today are still5 questions will be randomly selected from the 575 ** question bank (from past past questions) exclusively produced by Six-Point GrowthTo do this, each question will be marked with the serial number of the year and the current year, and a detailed explanation will be attached. Put the questions first and then put the analysis, so that the children can practice by themselves, and strive to complete and do 5 questions correctly within 8 minutes.
Set the 8-minute countdown, grab the scratch paper, and let's go!
Is it done?The answer is analyzed, if you haven't done it yet, don't slide down the page yet.
Question 1: a, the required knowledge point is algebra.
Calculate the distance traveled by Karl in order according to the title:
For the first time, 350 miles were driven.
The second time, calculated by fuel consumption. Consumed 10 gallons of gas, bought 8 gallons, and currently has 12 gallons of gas. Then drive until you have only half of the gas left, which is 7 gallons, so the second leg consumes 5 gallons of fuel, and you can drive 35 miles per gallon, so you can drive 35 5 = 175 miles for 5 gallons of fuel.
The total distance is the sum of the two legs: 350 + 175 = 525 miles.
Question 2: B, the required knowledge points are algebra and solving equations.
Suppose the number of girls in the class is x, then the number of boys is x-4 because the total number is 28, therefore.
x+x-4=28, and the solution is x=16. Therefore, the number of boys in the class is 12, and the number of girls and boys is 12.
The ratio is 16:12=4:3.
Question 3: a, the least common multiple of the knowledge point of this question.
According to the title, if there are 2 more gold coins, they can be divided equally between 6 people, or 5 people, so the number of gold coins at least 6 and 5 is the least common multiple of 6 and 5, which is 30, then the original number of gold coins is 28. Now it is divided equally among 7 people, just enough points, and there are 0 left.
Question 4: E, the knowledge points in this question are the average.
Answer: Since the average day needs to skate for 85 minutes, a total of 9 days of skiing, so the total time is 85 9 = 765 minutes. In the first 8 days, a total of 75 5 + 90 3 = 375 + 270 = 645 minutes, so on the 9th day, you need to ski 765-645 = 120 minutes, that is, 2 hours.
Question 5: a, the knowledge points of this question are arithmetic, the concept of reciprocal numbers, and the comparative size of negative numbers.
As long as you understand the concept of reciprocal numbers and compare the magnitude of negative numbers, this question is a scoring question, and you can get it right as long as you are careful.
How's it going, how many questions did you get right?How long does it take a few minutes?If it takes 8 minutes and you get it right, congratulations!There is a good chance of winning the award, it took more than 8 minutes or the accuracy is insufficient, don't be discouraged, there are still 10 days of sprint hope, come on!
Those who travel a hundred miles are half ninety", break through and overcome one or two difficulties every day, and reap good results!