Section 5.3 and 8.1

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Section 5.3 and 8.1

  1. 1. What is a fraction?
  2. 2. Learning Target: Students will learn how to write fractions/ratios and equivalent fractions/ratios. They will also learn how to write fractions/ratios in simplest form.
  3. 3. Fraction Top number: Numerator – is the counting number. It is a multiplier. It tells how many parts we have. Bottom number: Denominator – indicates by what number the whole has been divided in. Therefore it is a divisor. (cannot equal 0)
  4. 4. as a count of three things called fourths is three times what you get when you divide a whole into four parts
  5. 5. http://www.imaginativeteacher.com/images/fractions_3bmu.jpg Name the fractions
  6. 6. Another way to compare two numbers is a Ratio. The Ratio of a number a to a nonzero number b is the quotient when a is divided by b.
  7. 7. A ratio can be expressed three ways: • Using the fraction bar (division line) 3 5 • Using a colon symbol as in 3 : 5 • Using the “to” as in 3 to 5.
  8. 8. Write the ratio of 2 flutes to 16 clarinets in 3 ways. (Hint: What you read first goes first. What you read second goes second.)
  9. 9. Fractions/ratios are considered equivalent if they represent the same amount. To find equivalent fractions/ratios multiply or divide the numerator and denominator by the same nonzero number.
  10. 10. http://www.visualfractions.com/RenameHigherCircle/Highercircle1.gif
  11. 11. Write two fractions that are equivalent to the given fraction. 3 5
  12. 12. Answers: 6 , 9 10 15
  13. 13. Complete the statement. 2 ? 5 35
  14. 14. Answer: ? = 14
  15. 15. When is simplification helpful? Harmful?
  16. 16. A fraction/ratio is in simplest form when its numerator and denominator cannot be divided by anything except 1. (GCF = 1) To simplify a fraction/ratio divided both the numerator and denominator by their GCF.
  17. 17. Write the fraction/ratio in simplest form. 12 : 16
  18. 18. Answer: 3 : 4
  19. 19. Can you write fractions/ratios? Can you write equivalent fractions/ratios? Can you write fractions/ratios in simplest form.

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