Math 509 Lesson 4 Symbols And Elements Of A Set Worksheet Page 6
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5
6
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8
9Mastery Drill 6
6
6
The Decimal Key on a Calculator
5.
Most calculator digit displays show a decimal point at the end of every number you press.
5
207.
Press
. You get
2
0
7
Press
. You get
•
39.8
The decimal key
allows you to place the decimal wherever you want it.
3
9
•
8
Press
. You get
For a decimal that is less than 1, the first zero is already displayed. You do not need to
0
0.58
press the
key.
•
5
8
Press
. You get
For zeros at the end of a decimal, on the right side of the decimal point, you need not
0
press the
key. Remember 5.2, 5.20, and 5.200 are all names for the same number.
36.4
5.2 × 7 =
36.4
5.20 × 7 =
36.4
5.200 × 7 =
¢
$
For money amounts, just press the decimal key. There are no
or
keys.
•
3
5
For 35¢ press
.
1
•
5
9
For $1.59 press
.
Fill in the keys you must press to enter the following on the calculator. You will not
need to fill in all the keys.
The first one is done for you.
2
•
6
4
1. a. 2.64
b. 0.05
2. a. 457
b. 7.180
3. a. 3.07
b. 60.0
4. a. $6.00
b. 4.00
19
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