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Fractions

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  • 1. ractions ubtracting dding & Presented By: Aisha Mubarak-Sara hamad Supervised By: Dr. A. Al-Failakaway
  • 2. Fractions 1 2 / 10 1 / 12 1 / 8 11 / 12 Definition: A fraction is an ordered pair of whole numbers, the 1 st one is usually written on top of the other, such as ½ or ¾ . numerator denominator
  • 3. 7, 14, 21, 28, 35… 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 Count by 2's Count by 7's 1-Adding Fractions + Common Denominator is needed to add these fractions.
  • 4. + = x 2 x 2 = X 7 x 7 7 6 7 + 6 = 13 Add the numerators 13 Make equivalent fractions.
  • 5. More Examples: = = = = = = = = =
  • 6. 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 11, 22, 33, 44, 55, 66, 77… Count by 11's Count by 5's 2-Subtracting Fractions - We need a common denominator to subtract a fraction from another.
  • 7. = x 5 x 5 = x 11 x 11 4 15 - 11 = 4 Subtract. Make equivalent fractions. - 15 11
  • 8. More Examples:
  • 9. Try These A F E B C D
  • 10. Try These A F E B C D 17 27 19 20 10 9 41 28 26 21 13 12
  • 11. Questions ?