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Wednesday, Nov. 19, 2013

Directions : Please come in and get your journal. On your next blank page, write today’s date on the top line. Title this page ~ Multiplying and Dividing Fractions . Below the date, write the Challenge Question.

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Wednesday, Nov. 19, 2013

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  1. Directions: Please come in and get your journal. On your next blank page, write today’s date on the top line. Title this page ~ Multiplying and Dividing Fractions. Below the date, write the Challenge Question. Challenge Question: How can I choose the correct operations to solve problems involving fractions? Wednesday, Nov. 19, 2013 Warm-up (independent, level 0 noise): Please complete this in your journal below the CQ Add or Subtract the following Fractions: + - -

  2. Presentation • On Monday, we learned how to add and subtract fractions by finding common denominators and making equivalent fractions. • Today, you will learn how to solve problems using multiplication and division of fractions.

  3. Review: Adding and Subtracting Fractions • We can add and subtract fractions with the same (common) denominator easily. 3 5 1 5 4 5 + =

  4. Multiplying and Dividing Fractions • When multiplying and dividing fractions, we do not need to have common denominators. 3 5 1 3 x = These do not have to be the same!

  5. Multiplying Fractions • To multiply fractions, simply multiply the two numerators and the two denominators. x = 3 5 ? ? 1 3 x =

  6. Multiplying Fractions • To multiply fractions, simply multiply the two numerators and the two denominators. x = 3 5 3 ? 1 3 x =

  7. Multiplying Fractions • To multiply fractions, simply multiply the two numerators and the two denominators. 3 5 3 ? 1 3 x = x =

  8. Multiplying Fractions • To multiply fractions, simply multiply the two numerators and the two denominators. 3 5 3 15 1 3 x = x =

  9. Multiplying Fractions • If possible, state in simplest form. 3 5 3 15 1 5 1 3 x = =

  10. Dividing Fractions • To divide by a fraction, you must multiply by its reciprocal. • To find its reciprocal, simply flip the fraction over! 3 5 5 3 The reciprocal of 3/5 is 5/3.

  11. Dividing Fractions • Example: 3 5 1 3 = ÷ Multiply by the reciprocal… 9 5 3 5 3 1 x =

  12. Learning Together • Our goal: I can multiply fractions and use the “Keep, Change, Flip” method to divide fractions. • Assignment: Multiplying & Dividing Fractions practice sheet with your partner(s). *You have 30 minutes to complete the 11 problems*

  13. Just For Me • Complete the Pizzazz puzzle titled “Moving Words” by yourself.

  14. Ticket out the Door (Assessment) • Find the area of a rectangle with a length of and a width of . Don’t forget to put your name on your notecard 

  15. Wrap Up • Homework: Complete the Pizzazz puzzle (if you did not finish). This is due on Friday at the beginning of class. • Take your journal home to help you. If you finished, put your journal back in the bin. • How did we do today? • Did we maintain classroom operating procedures? • Did we work toward our learning goals? We will learn how to solve problems using multiplication and division of fractions. • Did we complete the tasks?

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