Texas Instruments TI-30X Teachers Guide - Page 10

Star Voyage - Scientific Notation - scientific calculator

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Star Voyage - Scientific Notation Overview Students investigate scientific notation by changing numbers into scientific notation, and then using them in calculations. Math Concepts • scientific notation • addition • division Materials • TI-30X ÙS • pencil • student activity Introduction Set up the activity by telling your students: The standard form for scientific notation is a Q 10n, where a is greater than or equal to 1 and less than 10, and n is an integer. 1. Have students practice writing the following numbers in scientific notation using pencil and paper. a. 93 000 000 b. 384 000 000 000 c. 0.00000000000234 d. 0.0000000157 9.3 Q 107 3.84 Q 1011 2.34 Q 10-12 1.57 Q 10-8 2. Have students change the following numbers into scientific notation using the TI-30X ÖS. a. 12 000 000 b. 974 000 000 c. 0.0000034 d. 0.000000004 1.2 Q 107 9.74 Q 108 3.4 Q 10-6 4 Q 10-9 Note: Answers assume the default floating decimal setting. 3. Have students change the following numbers into floating decimal (standard notation). a. 5.8 Q 107 b. 7.32 Q 105 c. 6.2 Q 10-6 d. 3 Q 10-8 58 000 000 732 000 0.0000062 0.00000003 Note: To enter a negative number, press M and then enter the number.  1. Enter the first number. 12000000 2. Press % d. FLO SCI ENG 3. Press " <

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© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
6
Star Voyage — Scientific Notation
Overview
Students investigate scientific notation by changing
numbers into scientific notation, and then using
them in calculations.
Math Concepts
• scientific
notation
• addition
• division
Materials
• TI-30X
Ù
S
• pencil
• student activity
Introduction
Set up the activity by telling your students:
The standard form for scientific notation is
a
Q
10
n
,
where
a
is greater than or equal to 1 and less than
10, and
n
is an integer.
1.
Have students practice writing the following
numbers in scientific notation using pencil and
paper.
a.
93 000 000
9.3
Q
10
7
b.
384 000 000 000
3.84
Q
10
11
c.
0.00000000000234
2.34
Q
10
-12
d.
0.0000000157
1.57
Q
10
-8
2.
Have students change the following numbers into
scientific notation using the TI-30X
Ö
S.
a.
12 000 000
1.2
Q
10
7
b.
974 000 000
9.74
Q
10
8
c.
0.0000034
3.4
Q
10
-6
d.
0.000000004
4
Q
10
-9
Note:
Answers assume the default floating decimal
setting.
±
1.
Enter the first number.
12000000
2.
Press
%
d
.
FLO
SCI
ENG
3.
Press
"
<
<
.
12000000
1.2
x10
07
4.
Now, just type the next
number and press
<
.
3.
Have students change the following numbers into
floating decimal (standard notation).
a.
5.8
Q
10
7
58 000 000
b.
7.32
Q
10
5
732 000
c.
6.2
Q
10
-6
0.0000062
d.
3
Q
10
-8
0.00000003
Note:
To enter a negative number, press
M
and then
enter the number.
‡
1.
Enter
5.8
; press
%
C
.
5.8
¯
2.
Enter
7
;
press
%
d
.
FLO
SCI
ENG
3.
Press
!
.
FLO
SCI
ENG
4.
Press
<
<
.
5.8
¯
7
58000000.
5.
Type the next number and
press
<
.