Operations on Decimals

I. OBJECTIVES

At the conclusion of this lesson you should be able to:

1. Add and subtract of decimals .
2. Multiply decimals .
3. Divide decimals .
4. Converting fractions to decimals and decimals to fractions.
5. Solve applications involving decimals.

II. PROCEDURE

Put DVD 8 in and go to Section 4.2. While watching the DVD, follow this study
guide and take notes in the study guide as if you were sitting in a classroom. Stop
or pause the DVD as needed to catch up or copy something down.

Adding Decimals

3.85 + 10.6

When adding decimals , what do we do? ______________________________

__________________________________________________________________

-8.23 + 6.985

What do we do when we subtract decimals ? ______________________________

__________________________________________________________________

36.8 + 4.37 + 11.295

-8.9 + 12.3 – 4.86

-8 – (-2.36)

Multiplication of Decimals

(-2.3)(4.5)

(1.21)(-0.0004)

(10)(4.23)

When you multiply by 10, the decimal moves how many places to the right? ____

(100)(4.23)

(1000)(4.23)

(10,000)(4.23)

(0.72)(-3.2)

(-52.8) ÷ (-9.1)

-8.919 ÷ 0.09

Divide and round to the nearest hundredth.

19.07 ÷ (-0.54)

Turn to page 266 in your textbook.
Problem # 34.

Turn to page 266 in your textbook.
Problem # 38.

Turn to page 266 in your textbook.
Problem # 40.

Turn to page 268 in your textbook.
Problem # 80.

Turn to page 270 in your textbook.
Problem # 126.

What is a terminating decimal ? ____________________________________

__________________________________________________________________

What is a repeating decimal ? __________________________________________

__________________________________________________________________

How do we convert a decimal to a fraction ? ______________________________

__________________________________________________________________

Converting decimals to fractions .

2.8 The 2 is in the ________ place and the 8 is in the __________ place.

6.45

12.08

Place < or > between the following:

Turn to page 272 in your textbook.
Problem #192.

Turn in your textbook to page 275.
Problem #210.

Turn in your textbook to page 275.
Problem #214.

III. HOMEWORK

SECTION 4.2
p. 265
1-221 odd