1. Topic E multiplying decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7

2. Objective: M ultiply a decimal fraction by single- digit whole numbers, including using estimation to confirm the placement of the decimal point. Grade 5 Module 1 Lesson 12

3. MATERIALS NEEDED FOR THIS LESSON P ersonal White Boards Teacher Student Teacher Pages Student Pages Sprint A & B Problem Set Exit Ticket Homework

4. Fluency Practice (12 minutes)

5. 1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK! Add Decimals SPRINT A 5.NBT.7 9 minutes

6. 1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK! Add Decimals SPRINT B 5.NBT.7 9 minutes

7. Find the Product 5.NBT.7 3 minutes 4 x 2 = 4 x 0.2 = 4 x 0.02 =

8. 5 x 3 = 5 x 0.3 = 5 x 0.03 =

9. 3 x 2 = 3 x 0.03 = 3 x 0.23 = 2 x 0.14 =

10. Application Problem (8 minutes) Patty buys 7 juice boxes a month for lunch. If one juice costs $2.79, how much money does Patty spend on juice each month? Use an area model to solve.

11. Concept Development (30 minutes)

12. Multipling Decimals 31 x 4 = 3.1 x 4 = 0.31 x 4 = How are these problems alike?

13. Problem 1 31 x 4 = 3 tens + 1 one 412 tens 4 ones 120 + 4 = 124 answer

14. Problem 2 3.1 x 4 = 3 ones + 1 tenth 4 12 ones 4 tenths 12 + 0.4 = 12.4 answer

15. Problem 3 0.31 x 4 = 3 tenths + 1 hundredths 412 tenths 4 hundredths.12 + 0.04 =.124 answer

16. Problem 4 5.1 x 6 = 5 1 tenth x 6 30 6 answer

17. Problem 5 11.4 x 4 = 1 1 4 tenth x 4 4 4 16 4 5 6 answer

18. Problem 6 7.8 x 3 = 7 8 tenth x 3 21 24 2 3 4 answer

19. Problem 7 3.12 x 4 = 1248 1.248 12.48 124.8

20. Problem 8 3.22 x 5 = 1610 1.610 16.10 161.0

21. Problem 9 3.42 x 6 = 2,052 2.052 20.52 205.2

22. Problem 10 0.733 x 4 = 2.932 29.32 293.2 2,932 reasonable answer area model 7 tenths + 3 hundredths + 3 thousandths 28 tenths 0.12 0.012 4 12 hundredths 12 thousandths 2.8 + + =2.932 7 3 3 thousandths x 4 28 12 12 2 9 3 2 vertical multiplication

23. Problem 11 10.733 x 4 = 42,932 4.2932 42.932 429.32 4293.2 reasonable answer 1 0 7 3 3 thousandths x 4 4 0 28 12 12 4 2 9 3 2 vertical multiplication 1 ten + 0 ones + 7 tenths + 3 hundredths + 3 thousandths 4 40 + 0 + 2.8 + 0.12 + 0.012 = _________________ 40 0 2812 area model

24. Problem 12 5.733 x 4 = 22,932 2.2932 22.932 229.32 2293.2 reasonable answer 5 7 3 3 thousandths x 4 20 28 12 12 2 2 9 3 2 vertical multiplication 5 ones + 7 tenths + 3 hundredths + 3 thousandths 4 20 + 2.8 + 0.12 + 0.012 = _________________ 20 28 12 area model

25. Problem Set (10 minutes) Do Your Personal Best (Complete independently!)

26. Student Debrief (10 minutes) How does the area model help you to justify the placement of the decimal point for the product in 1b? How can whole number multiplication help you with decimal multiplication?

27. EXIT TICKET (3 minutes) Complete the exit ticket and turn in...

28. HOMEWORK