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5 Minute Check

5 Minute Check. Estimate. Complete in your notebook. 1 1. 5 x 26 5 1 2. 7 x 9 1 3 3. 4 3 x 2 4. 5 Minute Check. Estimate. Complete in your notebook. 1 1. 5 x 26. 5 Minute Check. Estimate. Complete in your notebook. 1 1. 5 x 26 ≈ 5 1 5 x 25 =

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5 Minute Check

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  1. 5 Minute Check Estimate. Complete in your notebook. 1 1. 5 x 26 51 2. 7 x9 1 3 3. 43x2 4

  2. 5 Minute Check Estimate. Complete in your notebook. 1 1. 5 x 26

  3. 5 Minute Check Estimate. Complete in your notebook. 1 1. 5 x 26 ≈ 5 1 5x 25 = 12525 5 x 1 = 5 = 5

  4. 5 Minute Check Estimate. Complete in your notebook. 51 2. 7 x9

  5. 5 Minute Check Estimate. Complete in your notebook. 51 2. 7 x9 ≈ 0 1 2x 0 = 0

  6. 5 Minute Check Estimate. Complete in your notebook. 1 3 3. 43x2 4

  7. 5 Minute Check Estimate. Complete in your notebook. 1 3 3. 43x2 4 ≈ 12 4 x 3 = 12

  8. Flashcards

  9. Tuesday, Oct 22 Lesson 4.2 Multiply Fractions and Whole Numbers

  10. Multiply Fractions and Whole Numbers Objective: To understand how to multiply fractions and whole numbers.

  11. Multiply Fractions and Whole Numbers At the end of this lesson you should be able to answer the following question. How is the process used to multiply a fraction and whole number similar to the process used to multiply two whole numbers?

  12. Multiply Fractions and Whole Numbers To multiply fractions, multiply the numerators and multiply the denominators, then simplify if needed. Example x = 32 63 4 x 5 = 20 = 10 x =

  13. Multiply Fractions and Whole Numbers To multiply a fraction and whole number, convert the whole number to a fraction, then multiply as before. Example 2 5 x14 x = 214 283 5 x 1 = 5 =55 x =

  14. Multiply Fractions and Whole Numbers Multiply. 2 2x 5= Estimate?

  15. Multiply Fractions and Whole Numbers Multiply. 2 2x 5= Estimate? 224 1 x 4= 4= 1 Actual Product?

  16. Multiply Fractions and Whole Numbers Multiply. 2 2x 5= Actual Product? 224 1 x 5= 5 Is this a reasonable answer?

  17. Multiply Fractions and Whole Numbers Multiply. 2 2x 5= Actual Product? 224 1 x 5= 5 4 Is this a reasonable answer? 5 ≈1

  18. Multiply Fractions and Whole Numbers Multiply. 2 6x 3 = (Do this on your own)

  19. Multiply Fractions and Whole Numbers Multiply. 2 6x 3 = Estimate?

  20. Multiply Fractions and Whole Numbers Multiply. 2 6x 3 = Estimate? Since 3 and 6 are in the same multiples list we really do not need an estimate. Actual Product?

  21. Multiply Fractions and Whole Numbers Multiply. 2 6x 3 = Actual Product? 6212 1 x 3 = 3= 4

  22. Multiply Fractions and Whole Numbers When multiplying a fraction by a whole number, the order of the factors does not change the product. This is true for any numbers and is an example of the Commutative Property. Example 2 x 5 = 5 x 2

  23. Multiply Fractions and Whole Numbers Multiply. 3 4x 5 = Estimate?

  24. Multiply Fractions and Whole Numbers Multiply. 3 4x 5 = Estimate? 43 12 1 x 4 = 4 = 3 Actual Product?

  25. Multiply Fractions and Whole Numbers Multiply. 3 4x 5 = Actual Product? 4312 2 1 x 5= 5= 2 5 Is this a reasonable answer?

  26. Multiply Fractions and Whole Numbers Multiply. 3 4x 5 = Actual Product? 4312 2 1 x 5= 5= 2 5 2 Is this a reasonable answer? 2 5 ≈ 3

  27. Multiply Fractions and Whole Numbers Multiply. 1 4 x 5 = Estimate?

  28. Multiply Fractions and Whole Numbers Multiply. 1 4 x 5 = Estimate? 144 4 x 1= 4 =1 Actual Product?

  29. Multiply Fractions and Whole Numbers Multiply. 1 4 x 5 = Actual Product? 155 1 4 x 1 = 4 = 14 Is this a reasonable answer?

  30. Multiply Fractions and Whole Numbers Multiply. 1 4 x 5 = Actual Product? 155 1 4 x 1 = 4 = 14 1 Is this a reasonable answer? 14≈ 1

  31. Multiply Fractions and Whole Numbers 4 A sloth spends 5 of it’s life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep? (Do this on your own)

  32. Multiply Fractions and Whole Numbers 4 A sloth spends 5 of it’s life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep? Estimate?

  33. Multiply Fractions and Whole Numbers 4 A sloth spends 5 of it’s life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep? Estimate? 430120 5 x 1= 5 = 24 Actual Product?

  34. Multiply Fractions and Whole Numbers 4 A sloth spends 5 of it’s life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep? Actual Product? 4281122 5 x 1= 5 = 22 5 Is this a reasonable answer?

  35. Multiply Fractions and Whole Numbers 4 A sloth spends 5 of it’s life asleep. If a sloth lives to be 28 years old, how many years does it spend asleep? Actual Product? 4281122 5 x 1= 5 = 22 5 2 Is this a reasonable answer? 225 ≈ 24

  36. Multiply Fractions and Whole Numbers One evening, 2/3 of Mrs. Thorne’s students watched a reality TV show. Of Mrs. Lombardo’s students, 4/5 watched the same reality show. Which teacher had more students watch the show? (Do this on your own)

  37. Multiply Fractions and Whole Numbers One evening, 2/3 of Mrs. Thorne’s students watched a reality TV show. Of Mrs. Lombardo’s students, 4/5 watched the same reality show. Which teacher had more students watch the show? Mrs. T 23672 3 x 1 = 3 =24 Mrs. L 430120 5 x 1 =5 = 24

  38. Multiply Fractions and Whole Numbers Natalie multiplied 2/3 by 123 and got 156. Is this a reasonable answer?

  39. Multiply Fractions and Whole Numbers Natalie multiplied 2/3 by 123 and got 156. Is this a reasonable answer? No, because if you multiply a whole number by a fraction the answer will always be less than the whole number.

  40. Multiply Fractions and Whole Numbers How is the process used to multiply a fraction and whole number similar to the process used to multiply two whole numbers?

  41. Multiply Fractions and Whole Numbers Agenda Notes Homework – Homework Practice 4-2 Show all work Due Wednesday, Oct 23 Mid Chapter 4 Quiz –Monday, Oct 28

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