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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:
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
1221 odd
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