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. 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. Common Core Standards

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

4. Activate Knowledge What is the base? 10 2

5. Activate Knowledge What is the exponent? 10 2

6. Activate Knowledge Convert to a multiplication sentence with the answer. 10 2

7. Activate Knowledge What is the base? 10 3

8. Activate Knowledge What is the exponent? 10 3

9. Activate Knowledge Convert to a multiplication sentence with the answer. 10 3

10. Activate Knowledge What is the base? 10 4

11. Activate Knowledge What is the exponent? 10 4

12. Activate Knowledge Convert to a multiplication sentence with the answer. 10 4

13. Activate Knowledge What is the base? 10 5

14. Activate Knowledge What is the exponent? 10 5

15. Activate Knowledge Convert to a multiplication sentence with the answer. 10 5

16. Activate Knowledge What is the base? 10 7

17. Activate Knowledge What is the exponent? 10 7

18. Activate Knowledge Convert to a multiplication sentence with the answer. 10 7

19. 324 × 251 Activate Knowledge

20. 324 × 201 Activate Knowledge

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. greenred yellowblue 302 5 40 redbluered green yellow gree n redbluered 5355 1 1 30

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

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

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

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

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

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

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

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

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

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

32. Practice

41. Review