Transparency 1

1
Transparency 1
Click the mouse button or press the Space Bar to
display the answers.
2
Splash Screen
3
Example 1-5c
Objective
Express rational numbers as decimals and decimals
as fractions
4
Example 1-5c
Vocabulary
Rational number
Any number that can be expressed in the form a/b,
where a and b are integers and b ? 0 All
integers, fractions, and mixed numbers are
rational numbers
5
Example 1-5c
Vocabulary
Terminating decimal
A decimal when the division ends, or terminates,
and the remainder is 0 .625
6
Example 1-5c
Vocabulary
Repeating decimal
A decimal where it is not possible to write all
the digits without a remainder .666. . . Would
be written .6
7
Example 1-5c
Vocabulary
Bar notation
A bar placed above the repeating part of a
decimal 8.6363636363. . . 8.63
8
Lesson 1 Contents
Example 1 Write a Fraction as a Decimal Example
2 Write a Mixed Number as a Decimal Example
3 Round a Repeating Decimal Example 4 Write a
Terminating Decimal as a Fraction Example 5 Write
a Repeating Decimal as a Fraction
9
Example 1-1a
Write problem
Use the calculator
Put numerator in calculator which is 3
Push ?
Answer
0.1875
Put denominator in calculator which is 16
Push
1/5
10
Example 1-1c
Answer 0.0625
1/5
11
Example 1-2a
Write problem
Use the calculator
Write the whole number which is 3 and then a
decimal
Put numerator in calculator which is 2
Push ?
3.
Put denominator in calculator which is 11
Push
2/5
12
Example 1-2a
Notice a zero is in the ones place on the
calculator
The zero has no value as a whole number so drop it
There is a repeating number which is 18
3.
3.18
Put 18 to the right of the decimal
Put a bar notation over the 18 since it is
repeating
Answer 3.18
2/5
13
Example 1-2c
Answer 5.1
2/5
14
Example 1-3a
AGRICULTURE A Florida farmer lost the fruit on 8
of 15 orange trees because of unexpected
freezing temperatures. Find the fraction of the
orange trees that did not produce fruit, then
write it as a decimal
Write problem
8 .
15
Remember a fraction is a part over the whole
Part 8 that did not produce fruit
Whole All the orange trees
3/5
15
Example 1-3a
Now write as decimal using the calculator
8 .
Put numerator in calculator which is 8
15
Push ?
Put denominator in calculator which is 15
0.53333 . . .
Push
3 is repeating so write 0.53
Answer
0.53
Put a bar notation over the repeating 3
3/5
16
Example 1-3b
SCHOOL In Mrs. Hinotes eighth grade science
class, 4 out of 22 students did not turn in their
homework. Find the fraction of the students who
did not turn in their homework, then write it as
a decimal rounding to the nearest hundredth.
Answer 0.18
3/5
17
Example 1-4a
Write problem
Use the calculator
Write 0.32 as a fraction.
Put number in calculator as it is read 0.32
0.32
Push the 2nd key
0.32
2nd
Push the
This key converts fractions to decimals and
decimals to fractions
4/5
18
Example 1-4b
Write 0.16 as a fraction.
Answer
4/5
19
Example 1-5a
Write problem
Use the calculator
Remember the bar notation over the 7 means the 7
is being repeated
Put number in calculator 2.7 and repeat the 7
several time
2.77777
2nd
Push the 2nd key
Push the
Answer
5/5
20
Example 1-5c

Answer
5/5
21
End of Lesson 1
Assignment
Lesson 21 Fractions Decimals 14 - 37 All