Thomas was buying candy. He measured out 2.65 pounds. Is this

closer to 2.6 or 2.7 pounds?

In this lesson you will learn how to round decimals to the

nearest tenth by using a number line.

Let’s Review

= 0.3 = 0.30

equivalent

Let’s Review

rounding

$36.87 $40.00

A Common Misunderstanding

0.80 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 5.04.48 4.0

Core Lesson

6.2 6.36.24

What is 6.24 rounded to the nearest tenth?Between which two tenths is

6.24?6.24

0.04 0.06<

= 6.2

6.20 6.30

Core Lesson

1.1 1.21.18

What is 1.18 rounded to the nearest tenth?

Between which two tenths is

1.18?

1.18

0.08 0.02>

= 1.2

1.10 1.20

Core Lesson

2.5 2.62.549

What is 2.549 rounded to the nearest tenth?

Between which two tenths is

2.549?2.549

0.049 0.051<

= 2.5

2.500 2.6002.540 2.550

Core Lesson

2.6 2.72.65

Thomas was buying candy. He measured out 2.65 pounds. Is this closer to 2.6 or 2.7 pounds?

Between which two tenths is

2.65?2.65

0.05 0.05=

= 2.7If the distance is

equal, the numeral will always round

up.

2.60 2.70

In this lesson you have learned how to round

decimals to the nearest tenth by using a number line.