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# Topic C P lace value and rounding decimal fractions - PowerPoint PPT Presentation

Topic C P lace value and rounding decimal fractions. STANDARD - 5.NBT.4. Grade 5 Module 1 Lesson 8. Objective: R ound a given decimal to any place  using place value understanding and  the vertical number line. MATERIALS NEEDED FOR THIS LESSON. Student. P ersonal White Boards.

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Place value and rounding decimal fractions

STANDARD - 5.NBT.4

Module 1 Lesson 8

Objective:

Round a given decimal to any place  using place value understanding and  the vertical number line.

FOR THIS LESSON

Student

Personal White Boards

Student Pages

Problem Set

Exit Ticket

Homework

Teacher

Teacher Pages

Fluency Practice(12 minutes)

6 minutes

5.NBT.3

Say the number as a decimal

13 tenths = _________

24 tenths = _________

124 tenths = _________

524 tenths = _________

2.5 tenths = _________

17.5 tenths = _________

27.5 tenths = _________

24.5 tenths = _________

24.3 tenths = _________

42.3 tenths = _________

37 hundredths = _________

137 hundredths = _________

537 hundredths = _________

296 hundredths = _________

0.548 = _________ thousandths

1.548 = _________ thousandths

2.548 = _________ thousandths

7.352 = _________ thousandths

9

6 minutes

5.NBT.4

9

8.735

8.735

8.5

round to the ones

8.8

8.74

8

8.75

8.74

8.735

8.735

round to the tenths

round to the hundredths

8.7

8.735

8.7

8.73

8

7.5

round to the ones

7

7.5

7.458

7.46

7.458

7.5

7

7.46

7.458

7.45

round to the tenths

7.455

round to the hundredths

7.4

7.45

(6 minutes)

Organic, whole-wheat flour sells in bags  weighing 2.915 kilograms? How much flour is  this rounded to the nearest tenth? How much  flour is this rounded to the nearest one? What is  the difference of the two answers? Use a place  value chart and number line to explain your  thinking.

round 49.67 to the nearest ten

5 tens or 50

decomposition

45.67

4 tens or 40

decomposition ones

50

49.5

49

decomposition tenths

49.7

49.65

49.6

9.949 round to the nearest tenth and hundreth

9.949

10

decomposition tenths

9.95

9.95

9.9

decomposition hundredths

9.955

9.94

28

Determine the maximum and minimum possible values

_______ 27

27.5

maximum

27

27

26.5

minimum

26

Problem Set (10 minutes)

(Complete independently!)

Student Debrief (10 minutes)

Compare how we rounded in lesson 7 to lesson 8.  How are they alike? How are they different?

Once a number rounds up at one place value,  does it follow then that every place value will  round up? Why or Why not?

How does the place value chart help  organize your thinking when rounding

EXIT TICKET (3 minutes)

Complete the exit ticket and turn in...