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How do you round 5.1 to the nearest whole number? - PowerPoint PPT Presentation


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How do you round 5.1 to the nearest whole number?. In this lesson you will learn to round decimals to the nearest whole number by using a number line. 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. Number Line. 15 = 15.0 365 = 365.0 674 = 674.0.

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Presentation Transcript
slide2

In this lesson you will learn to round decimals to the nearest whole number by using a number line.

slide3

0

1

2

3

4

5

6

7

8

9

Number Line

slide4

15 = 15.0

365 = 365.0

674 = 674.0

slide5

How do you round 7.7 to the nearest whole number using a number line?

7

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8

=

Numbers closer to 7

=

Numbers closer to 8

slide6

How do you round 5.1 to the nearest whole number?

5

5.1

5.2

5.3

5.4

5.5

5.6

5.7

5.8

5.9

6

=

Numbers closest to 5

=

Numbers closest to 6

slide7

In this lesson you have learned to round decimals to the nearest whole numberby using a number line.

slide8

How do you round 8.5 to the nearest whole number?

9

8

8.1

8.2

8.3

8.4

8.5

8.6

8.7

8.8

8.9

=

Numbers closest to 8

=

Numbers closest to 9

slide9

The five top swimmers in an event had the following times:

Emily 64.5 seconds

Molly 64.4 seconds

Martha 63.9 seconds

Kathy 64.8 seconds

Rhonda 63.3 seconds

Using a number line illustrate how to round these numbers to the nearest whole number.

slide10

Base Block Decimals

1

  • Get a partner and a set of base ten blocks.
  • Rods = ones place, units =tenths place.
  • Create the following decimals using the
  • base ten blocks:
  • 4.2 7.6 9.3 5.4
  • 3.1 6.5 2.9 8.7

2

3

Round the decimals to the nearest whole

number.

slide11

How do you round 4.6 to the nearest whole number using a number line?

How do you round 9.2 to the nearest whole number using a number line?