Edi Ns 1 2 Decimal Equivalents of Common Fractions

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Edi Ns 1 2 Decimal Equivalents of Common Fractions

  1. 1. Today we will find decimal equivalents for common fractions equivalent= alike fraction=part of a whole decimal=a number less than 1 Concept
  2. 2. Place over 100 Sounds like fraction Divide Divide Move decimal two places to the left Move the decimal two places to the right and add % APK
  3. 3. Divide
  4. 4. Equivalent means to show the same number in a different way. Equivalent CD 7 10 = 0.7
  5. 5. CD _ 7 10
  6. 9. <ul><li>½ = .50 = 50%= </li></ul><ul><li>¼ = .25 = 25% = </li></ul>
  7. 10. <ul><li>Write    9  </li></ul><ul><li>25   </li></ul>as a decimal
  8. 11. <ul><li>Write    9  </li></ul><ul><li>25   </li></ul>as a decimal
  9. 12. <ul><li>Write    9  </li></ul><ul><li>25   </li></ul>as a decimal
  10. 13. <ul><li>Write    9  </li></ul><ul><li>25   </li></ul>as a decimal
  11. 14. Fraction <ul><li>A fraction is a number (numerator and denominator) that shows part of a whole set. </li></ul><ul><li>An example: </li></ul>CD Numerator Denominator
  12. 15. Decimal <ul><li>A number less than 1. </li></ul><ul><li>Examples: </li></ul><ul><li>0.50 </li></ul><ul><li>0.25 </li></ul><ul><li>0.33 </li></ul><ul><li>0.75 </li></ul><ul><li>Where 1 = 1.00 </li></ul>
  13. 16. Common fraction and their decimal equivalents Fraction Decimal Percent 1 1.0 100% 1/3 .333 33.3% 1/4 .25 25% 1/5 .2 20% 1/8 .125 12.5% 1/10 .1 10% 1/2 .5 50% 2/3 .666 66.6% 3/4 .75 75% 2/5 .4 40% 5/8 .624 62.5% 9/10 .9 90%
  14. 17. Another way to find decimals equivalents from fractions How to convert fraction to decimals What number do you have to multiply the denominator to get 100? X = X = You get 20/100 and you know that this is .20 .20
  15. 18. Why is understanding how to find decimal equivalents for common fractions important? <ul><li>You will know how to convert fractions to decimals. </li></ul><ul><li>It will be tested on future CST exams! </li></ul><ul><li>What are other reasons why it is important to know how to find decimal equivalents for common fractions </li></ul>IMP
  16. 19. Write a fraction and a decimal for each shaded part. = 8 6.00 7 - 56 40 - 4 0 5 00 .
  17. 20. Write a fraction and a decimal for each shaded part. = 0.41
  18. 21. Find the decimal for the fraction. =
  19. 22. Write a fraction for the shaded part of the pie graph. 2 8.00 4 - 8 0 0 - 0 0 0 00 . = <ul><li>Ask yourself, “How much of the pie graph is shaded?” </li></ul><ul><li>Write the shaded part as a fraction </li></ul><ul><li>Divide </li></ul><ul><li>Make sure your decimal is in the right place. </li></ul>
  20. 23. Write a fraction and a decimal for each shaded part. = 4 2.00 5 - 2 0 0 0 - 0 0 0 00 . <ul><li>Ask yourself, “How much of the pie graph is shaded?” </li></ul><ul><li>Write the shaded part as a fraction </li></ul><ul><li>Divide </li></ul><ul><li>Make sure your decimal is in the right place. </li></ul>
  21. 24. Let’s review how to find decimal equivalents for common fractions <ul><li>What is a decimal? </li></ul><ul><li>What is a fraction? </li></ul><ul><li>What are number equivalents? </li></ul><ul><li>How do you write as a decimal? </li></ul>“ out of a hundred” % Percent

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