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Module 2 Lesson 17

Module 2 Lesson 17. Use basic facts to estimate quotients with two-digit divisors. Common Core Standards.

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Module 2 Lesson 17

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  1. Module 2 Lesson 17 • Use basic facts to estimate quotients with two-digit divisors.

  2. Common Core Standards 5.NBT.1 Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.5.NBT.6 Find whole-number quotients of whole numbers with up to four-digit dividends and two- digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

  3. I can use basic facts to estimate quotients with two-digit divisors. Learning Targets

  4. Activate Knowledge Count by fours.

  5. Activate Knowledge Count by four tens. When I raise my hand stop counting.

  6. Activate Knowledge Count by fives.

  7. Activate Knowledge Count by five tens. When I raise my hand stop counting.

  8. Activate Knowledge Count by sevens.

  9. Activate Knowledge Count by seven tens. When I raise my hand stop counting.

  10. Activate Knowledge Round to the nearest 10 21 ≈ ___

  11. Activate Knowledge Round to the nearest 10 37 ≈ ___

  12. Activate Knowledge Round to the nearest 10 16 ≈ ___

  13. Activate Knowledge Round to the nearest 10 54 ≈ ___

  14. Activate Knowledge Round to the nearest 10 73 ≈ ___

  15. Activate Knowledge Round to the nearest 10 65 ≈ ___

  16. Activate Knowledge Round to the nearest 10 25 ≈ ___

  17. Activate Knowledge Write the division sentence 700 ÷ 10

  18. Activate Knowledge Write as a 2 step division sentence taking out the ten 800 ÷ 20

  19. Activate Knowledge Rewrite after solving the first part of the division problem 800 ÷ 20 800 ÷ 10 ÷ 2

  20. Activate Knowledge Write the answer 800 ÷ 20 800 ÷ 10 ÷ 2 80 ÷ 2

  21. Activate Knowledge Write the division sentence 15,000 ÷ 30

  22. Activate Knowledge Write as a 2 step division sentence taking out the ten 15,000 ÷ 30

  23. Activate Knowledge Rewrite after solving the first part of the division problem 15,000 ÷ 30 15,000 ÷ 10 ÷ 3

  24. Activate Knowledge Write the answer 15,000 ÷ 30 15,000 ÷ 10 ÷ 3 1500 ÷ 3

  25. Activate Knowledge Write the division sentence 15,000 ÷ 300

  26. Activate Knowledge Write as a 2 step division sentence taking out the ten 15,000 ÷ 300

  27. Activate Knowledge Rewrite after solving the first part of the division problem 15,000 ÷ 300 15,000 ÷ 100 ÷ 3

  28. Activate Knowledge Write the answer 15,000 ÷ 300 15,000 ÷ 100 ÷ 3 150 ÷ 3

  29. Activate Knowledge Write the division sentence 450,000 ÷ 50

  30. Activate Knowledge Write as a 2 step division sentence taking out the ten 450,000 ÷ 50

  31. Activate Knowledge Rewrite after solving the first part of the division problem 450,000 ÷ 50 450,000 ÷ 10 ÷ 5

  32. Activate Knowledge Write the answer 450,000 ÷ 50 450,000 ÷ 10 ÷ 5 45,000 ÷ 5

  33. Activate Knowledge Write the division sentence 21,000 ÷ 300

  34. Activate Knowledge Write as a 2 step division sentence taking out the ten 21,000 ÷ 300

  35. Activate Knowledge Rewrite after solving the first part of the division problem 21,000 ÷ 300 21,000 ÷ 100 ÷ 3

  36. Activate Knowledge Write the answer 21,000 ÷ 300 21,000 ÷ 100 ÷ 3 210 ÷ 3

  37. Activate Knowledge 852 pounds of grapes were packed equally into 3 boxes for shipping. How many pounds of grapes will there be in 2 boxes?

  38. Learn What’s the whole in this problem? 402 ÷ 19 Problem 1

  39. Learn What’s the divisor? 402 ÷ 19 Problem 1

  40. Learn Round the divisor first 402 ÷ 19 Problem 1

  41. Learn What should we round 402 to? 402 ÷ 19 ≈ _____ ÷ 20 Problem 1

  42. Learn What do we do first to estimatethe quotient? 149 ÷ 71 Problem 2

  43. Learn What should we round 149 to? 149 ÷ 71 ≈ _____ ÷ 70 Problem 2

  44. Learn What’s the estimated divisor? 427 ÷ 58 Problem 3

  45. Learn What should we round 427 to? 427 ÷ 58 ≈ _____ ÷ 60 Problem 3

  46. Learn What’s the estimated divisor? 293 ÷ 42 Problem 4

  47. Learn What should we round 293 to? 293 ÷ 42 ≈ _____ ÷ 40 Problem 4

  48. Learn What’s the estimated divisor? 751 ÷ 93 Problem 5

  49. Learn What should we round 751 to? 751 ÷ 93 ≈ _____ ÷ 90 Problem 5

  50. Practice

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