Example Karen’S Math Review2
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Example Karen’S Math Review2 Presentation Transcript

  • 1. Karen’s math review Adding and subtracting fractions
  • 2. Adding fraction with like denominators
    • If the denominator (the bottom number) is the same
      • Add the numerators (the top number)
      • Keep the bottom number the same
      • Simplify your answer
  • 3. example
  • 4. Adding if denominators are different
    • If the denominator (the bottom number) is the different
      • Find the LCM (least common multiple) of the denominator
      • Multiply the fractions by the factor that will create common denominators
      • Add the numerators (the top number)
      • Keep the bottom number the same
      • Simplify your answer
  • 5. example
    • The LCM is 6 so multiply
    • the first fraction
    • The second fraction would
      • be multiplied by 2
  • 6. Example continued
    • The two new fractions are
      • Since denominators are the same, add the numerators and keep the denominators the same and simplify
  • 7. Subtracting fraction with like denominators
    • If the denominator (the bottom number) is the same
      • subtract the numerators (the top number)
      • Keep the bottom number the same
      • Simplify your answer
  • 8. example
  • 9. Subtracting if denominators are different
    • If the denominator (the bottom number) is the different
      • Find the LCM (least common multiple) of the denominator
      • Multiply the fractions by the factor that will create common denominators
      • Subtract the numerators (the top number)
      • Keep the bottom number the same
      • Simplify your answer
  • 10. example
    • The LCM is 6 so multiply
    • the first fraction by 3
      • The second fraction would
      • be multiplied by 2
  • 11. Example continued
    • The two new fractions are
      • Since denominators are the same, subtract the numerators and keep the denominators the same and simplify, if needed
  • 12. Sample test
    • Solve
    • 1. 5/8-3/8=
    • 2. 4/3+3/4
    • 3. 1 ¾+2 ¼
    • 4. 2 3/8-1 ½
    • Which is more
    • 5. 4/5 2/3
  • 13. Sample test
    • Which is in lowest form
    • 6. 4/6 2/3 13/26
    • 7. 8-2/3
    • 8. 6/7+3/10
    • 9. 2/3+2
    • 10. ¼+1/2+1/4
    • 11. What is 1 st step in subtracting fractions with different denominators?
  • 14. Sample test
    • 12. What is the 3 rd step in adding mixed numbers?
    • What operations sign will make these two equations correct?
    • 13. ½ ¼ =3/4
    • 14. 3 1/3 1 5/6= 1 ½
    • What can you change to make this equation correct?
    • 15. ½ -1/3 =1
  • 15. Sample test
    • Write two mixed number problems that will give you the answer ½
    • 16.
    • 17.
    • What would happen if you subtract a fraction from a whole number?
    • 18.
    • Why does ¼+1/2 not equal 1/6?
    • 19.
    • Draw and label a square whose perimeter is 1 inch.
    • 20.