Carlos swam the 100 meter race in 59.813 seconds. What is his time rounded to the nearest hundredth

of a second?

In this lesson you will learn how to round decimals to the nearest hundredth by using a

number line.

Let’s Review

= 0.3 = 0.30

equivalent

Let’s Review

rounding

$36.87 $40.00

A Common Misunderstanding

0.8

0 1

Not dividing the whole into the correct number of equal parts.

0 1

A Common Misunderstanding

Misapplying a rounding “rule” in order to solve a problem.

4.48 4.5 5.0

4.48 4.0

Core Lesson

4.31 4.324.317

What is 4.317 rounded to the nearest hundredth?

Between which two hundredths is

4.317?

4.317

0.007 0.003>

= 4.32

4.310 4.320

Core Lesson

2.0 3.0

What is 2.544 rounded to the nearest hundredth?

Between which two hundredths is

2.544?

2.5442.544 comes between 2.5 and

2.6.

What if my number line only

shows tenths?

2.5 2.6

Core Lesson

2.60

What is 2.544 rounded to the nearest hundredth?

2.544

2.50

Core Lesson

2.54 2.552.544

What is 2.544 rounded to the nearest hundredth?

2.544

0.004 0.006<

= 2.54

2.5502.540

Core Lesson

59.81 59.8259.812

Carlos swam the 100 meter race in 59.812 seconds. What is his time rounded to the nearest hundredth of a second?

Between which two hundredths is

59.812?

59.812

0.002 0.008

= 59.81

<

59.810 59.820

In this lesson you have learned how to round

decimals to the nearest hundredth by using a

number line.