1. Module 2 Lesson 11
Multiply decimal fractions by multi-digit whole numbers through conversion to a whole number problem and reasoning about the placement of the decimal.

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 × ( ) is three times as large as , without having to calculate the indicated sum or product. 5.NBT.5 Fluently multiply multi-digit whole numbers using the standard algorithm.

3. Learning Targets
I can multiply decimal fractions by multi- digit whole numbers through conversion to a whole number problem and reasoning about the placement of the decimal.

4. Sprint A

7. Sprint B

10. Activate
Knowledge
3 × 4.1 is?

11. Activate
Knowledge
12.3 x 10 ÷ 10 is?

12. Activate
Knowledge
3 × 4.1×1 is?

13. Activate
Knowledge
3 × 2.4 is?

14. Activate
Knowledge
7.2 x 10 ÷ 10 is?

15. Activate
Knowledge
3 × 2.4 ×1 is?

16. Activate
Knowledge
3 × 4 × 17.6 ÷ 17.6 is?

17. Activate
Knowledge
Mr. Mohr wants to build a rectangular patio using concrete tiles that are 12 inches square. The patio will measure 13.5 feet by 43 feet. What is the area of the patio? How many concrete tiles will he need to complete the patio?

18. Compare this problem with the application problem
Learn
Compare this problem with the application problem
7.38 × 41
Problem 1

19. Learn
Estimate the product
7.38 × 41
Problem 1

20. Learn
Predict whether our estimate is greater than or less than the actual product.
7.38 × 41
Problem 1

21. Use an area model to find the product
Learn
Use an area model to find the product
7.38 × 41
Problem 1

22. Solve using the algorithm
Learn
Solve using the algorithm
7.38 × 41
Problem 1

23. Learn
Estimate the product
8.26 × 128
Problem 2

24. Learn
Predict whether our estimate is greater than or less than the actual product.
8.26 × 128
Problem 2

25. Use an area model to find the product
Learn
Use an area model to find the product
8.26 × 128
Problem 2

26. Solve using the algorithm
Learn
Solve using the algorithm
8.26 × 128
Problem 2

27. Learn
Estimate the product
82.51 × 63
Problem 3

28. Learn
Predict whether our estimate is greater than or less than the actual product.
82.51 × 63
Problem 3

29. Use an area model to find the product
Learn
Use an area model to find the product
82.51 × 63
Problem 3

30. Solve using the algorithm
Learn
Solve using the algorithm
82.51 × 63
Problem 3

31. Practice
Mixed Problems
7 11/8 = 8 3/8

37. Review
3.65