In this lesson you will learn to round decimals to the nearest
whole number by using a number line.
Slide 3
Lets Review 0123456789 Number Line
Slide 4
Lets Review 15 = 15.0 365 = 365.0 674 = 674.0
Slide 5
Core Lesson How do you round 7.7 to the nearest whole number
using a number line? 77.17.27.37.47.57.67.77.87.98 =Numbers closer
to 7 =Numbers closer to 8
Slide 6
Lets Review Core Lesson How do you round 5.1 to the nearest
whole number? 55.15.25.35.45.55.65.75.85.96 =Numbers closest to 5
=Numbers closest to 6
Slide 7
In this lesson you have learned to round decimals to the
nearest whole number by using a number line.
Slide 8
Lets Review Guided Practice How do you round 8.5 to the nearest
whole number? 88.18.28.38.48.58.68.78.88.9 9 =Numbers closest to 8
=Numbers closest to 9
Slide 9
Lets Review Extension Activities 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.
Slide 10
Lets Review Extension Activities Base Block Decimals Get a
partner and a set of base ten blocks. Rods = ones place, units
=tenths place. 1 2 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 3 Round the decimals to the
nearest whole number.
Slide 11
Lets Review Quick Quiz 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?
