Current location - Training Enrollment Network - Mathematics courses - The sixth "Learning Cup" national mathematics knowledge application competition, grade eight (B) examination paper.
The sixth "Learning Cup" national mathematics knowledge application competition, grade eight (B) examination paper.
Where is the map of 12?

13.

(1) solution: let the increased area be x.

The ratio of window area to building area is 10%

∴ The increase rate is10+x/100+x.

∴ 10+x/ 100+x- 10/ 100

=90X/( 1000+ 10X)

∵X & gt； 0

∴90x>； 0 1000+ 10X & gt； 0

∴ 90X/( 1000+ 10X)>0

Related articles
  • Solving problems in mathematics in the third grade of primary school
  • Mathematical formula of the first volume of the second grade
  • Are the numerical symbols in kindergarten the same as the mathematical symbols?
  • Is it difficult to take the postgraduate entrance examination in mathematics?
  • The second semester teaching plan of the second volume of the first grade mathematics
  • Brief introduction of Qixing kindergarten
  • One-dimensional linear equation application problem 15. Better add an answer.
  • What are the contents of the first volume of the fifth-grade mathematics tabloid?
  • 10 deeds and achievements of celebrities
  • Teaching plan of ladybug looking for leaves in junior high school mathematics activity class

    • copyright 2024 Training Enrollment Network All rights reserved