Current location - Training Enrollment Network - Mathematics courses - Mathematical problems; The school bought back 180 books and distributed them to three classes in grade five. 1 class is twice as many as class 2, and class 2 is 20 copies less than class 3. How many b
Mathematical problems; The school bought back 180 books and distributed them to three classes in grade five. 1 class is twice as many as class 2, and class 2 is 20 copies less than class 3. How many b
Mathematical problems; The school bought back 180 books and distributed them to three classes in grade five. 1 class is twice as many as class 2, and class 2 is 20 copies less than class 3. How many books are there in three classes? 1. Draw with the following formula: (180-20)/4=40 (Ben) 40*2=80 (Ben) 40+20=60 (Ben).

2. Solution: If Class Two is assigned X books, Class One is assigned 2x books and Class Three is assigned x+20 books.

x+2x+x+20= 180

4x= 160

x=40

2x=2*40=80

x+20=40+20=60

Class One is assigned 80 books, Class Two is assigned 40 books, and Class Three is assigned 60 books.

Related articles
  • Euler-a child who listens to chess stories
  • A divided by b equals C.
  • Math diary position
  • Mathematical problems of rational numbers in grade one.
  • Three essays on the analysis of mid-term examination papers in grade one of primary schools
  • The history of Rudolph
  • What kind of people are easy to learn math well?
  • Come on, friends who must pass the exam, say something.
  • What kinds of exams are there in public institutions?
  • How to cultivate students' good learning quality to improve students' math scores in vocational high schools?

    • copyright 2024 Training Enrollment Network All rights reserved