M & d fractions

971 views
827 views

Published on

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
971
On SlideShare
0
From Embeds
0
Number of Embeds
105
Actions
Shares
0
Downloads
9
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

M & d fractions

  1. 1. Multiplying and Dividng Fractions <ul><li>Reciprocal </li></ul><ul><li>Multiplying Fractions </li></ul><ul><li>Dividing Fractions </li></ul>QUIZ: Multiplying Fractions QUIZ: Dividing Fractions
  2. 2. Multiplying Fractions <ul><li>Change any mixed numbers into improper fractions. </li></ul><ul><li>Change any whole numbers into improper fractions by putting 1 under the whole number. </li></ul><ul><li>Cross cancel wherever possible. </li></ul><ul><li>Multiply horizontally. </li></ul><ul><li>Reduce if necessary. </li></ul>EXAMPLES
  3. 3. Reciprocal To find the reciprocal of a fractions, flip it! You need the reciprocal when dividing fractions! EXAMPLES: 2 3 3 2 2½ = 5 2 2 5
  4. 4. Dividing Fractions <ul><li>Change any mixed numbers into improper fractions. </li></ul><ul><li>Change any whole numbers into improper fractions by putting 1 under the whole number. </li></ul><ul><li>KEEP – SWITCH - FLIP </li></ul><ul><li>Cross cancel wherever possible. </li></ul><ul><li>Multiply horizontally. </li></ul><ul><li>Reduce if necessary. </li></ul>EXAMPLES
  5. 5. Examples of multiplying fractions 1 1 2 3 1 2 1 3 X <ul><li>X 2 = 2 </li></ul><ul><li>1 X 3 = 3 </li></ul>Another Example 3 8 4 9 X 3 8 4 9 X
  6. 6. Examples of multiplying fractions 2 ½ X ¼ 5 1 2 4 X 5 8
  7. 7. Examples of dividing fractions 5 10 9 12 KEEP SWITCH FLIP 1 3 4 2 1 4 3 2 x 4 6 2 3 Another Example 5 12 9 10 X
  8. 8. Examples of dividing fractions 3 ½ 2 ¼ 7 4 2 9 x 28 18 KEEP SWITCH FLIP 7 9 2 4 1 5 9 1 10 18
  9. 9. CHECK ANSWERS
  10. 10. Back to Quiz
  11. 11. <ul><li>6 divided by 3 ½ = </li></ul><ul><li>4/5 divided by 2/5 = </li></ul><ul><li>1 ½ divided by 3 ¾ = </li></ul><ul><li>3 ½ divided by 1 ¾ = </li></ul><ul><li>2 ½ divided by 2 ½ = </li></ul><ul><li>5 1/3 divided by 4/9 = </li></ul>Quiz: Dividing Fractions Check your answers
  12. 12. <ul><li>6 divided by 3 ½ = 1 5/7 </li></ul><ul><li>4/5 divided by 2/5 = 2 </li></ul><ul><li>1 ½ divided by 3 ¾ = 2/5 </li></ul><ul><li>3 ½ divided by 1 ¾ = 2 </li></ul><ul><li>2 ½ divided by 2 ½ = 1 </li></ul><ul><li>5 1/3 divided by 4/9 = 12 </li></ul>Answers: Dividing Fractions Back to Quiz

×