20
Fractions and Decimals
Remember!
When you have a fraction or a decimal displayed on the screen pressing the
n
button
will allow you to toggle between decimal and fractional representation. Pressing SHIFT
n
will toggle between an improper fraction and mixed numeral representation for
expressions with a value greater than 1. Instructions for entering fractions in MathIO and
LineIO are on pages 6 and 7.
Practice your skills with the following questions.
1.
Express
3
4
1 as a decimal.
2.
Express
7
8
2 as an improper fraction.
3.
Change 0.135 to a fraction.
4.
Write 2.65 as an improper fraction.
5.
What is
11
5
as a mixed numeral?
6.
Enter 5% into your calculator by pressing
5
SHIFT
(
.
Press
p
and
n
to
express 5% as a decimal and as a fraction.
7.
Express 36% as a fraction.
8.
What is 8% as a decimal?
9.
What number is equivalent to 125%?
10.
Express 45% as a fraction.
11.
Write 8.5% as a decimal.
12.
What decimal is equivalent to
3
8
?
13.
What improper fraction is equivalent to
2
5
4 ?
14.
Express
8
12
as a fraction in its simplest form. (Enter the fraction then press
p
.)
15.
Express
85
25
as a mixed numeral expressed in simplest form.
Answers
1
1.75
2
23
8
3
27
200
4
53
20
5
1
5
2
6
0.05,
1
20
7
9
25
8
0.08
9
1.25
10
9
20
11
0.085
12
0.375
13
22
5
14
2
3
15
17
5
© Sue Thomson and Shriro Australia PTY Limited. This page may be photocopied for classroom use.