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Module 2 Lesson 8

Module 2 Lesson 8. Fluently multiply multi-digit whole numbers using the standard algorithm and using estimation to check for reasonableness of the product. Common Core Standards.

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Module 2 Lesson 8

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  1. Module 2 Lesson 8 • Fluently multiply multi-digit whole numbers using the standard algorithm and using estimation to check for reasonableness of the product.

  2. Common Core Standards 5.OA.2 Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation “add 8 and 7, then multiply by 2” as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product.5.NBT.5 Fluently multiply multi-digit whole numbers using the standard algorithm.

  3. I can fluently multiply multi-digit whole numbers using the standard algorithm and using estimation to check for reasonableness of the product. Learning Targets

  4. Activate Knowledge What is the base? 102

  5. Activate Knowledge What is the exponent? 102

  6. Activate Knowledge Convert to a multiplication sentence with the answer. 102

  7. Activate Knowledge What is the base? 103

  8. Activate Knowledge What is the exponent? 103

  9. Activate Knowledge Convert to a multiplication sentence with the answer. 103

  10. Activate Knowledge What is the base? 104

  11. Activate Knowledge What is the exponent? 104

  12. Activate Knowledge Convert to a multiplication sentence with the answer. 104

  13. Activate Knowledge What is the base? 105

  14. Activate Knowledge What is the exponent? 105

  15. Activate Knowledge Convert to a multiplication sentence with the answer. 105

  16. Activate Knowledge What is the base? 107

  17. Activate Knowledge What is the exponent? 107

  18. Activate Knowledge Convert to a multiplication sentence with the answer. 107

  19. Activate Knowledge 324 × 251

  20. Activate Knowledge 324 × 201

  21. Activate Knowledge Erin and Frannie entered a rug design contest. The rules stated that the rug’s dimensions must be 32 inches × 45 inches and that they must use rectangles. They drew the following for their entries. Show at least three other designs they could have entered in the contest, and calculate the area of each section and the total of your rugs. 30 2 5 35 5 5 1 30 40 1

  22. Learn Round each factor to estimate the product. 314 × 236 Problem 1

  23. Learn Express the estimated product as a multiplication expression with an exponent 314 × 236 Problem 1

  24. Learn We rounded both factors down. Will the product be more or less than the estimate? 314 × 236 Problem 1

  25. Learn Solve using the standard algorithm 314 × 236 Problem 1

  26. Learn Round each factor to estimate the product. 1,882 x 296 Problem 2

  27. Learn We rounded both factors up. Will the product be more or less than the estimate? 1,882 x 296 Problem 2

  28. Learn Solve using the standard algorithm 1,882 x 296 Problem 2

  29. Learn Round each factor to estimate the product. 4,902 × 408 Problem 3

  30. Learn We rounded one factor up and the other down. Will the product be more or less than the estimate? 4,902 × 408 Problem 3

  31. Learn Solve using the standard algorithm 4,902 × 408 Problem 3

  32. Practice

  33. Review

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