Scientific Notation - Texas Instruments TI-15 Teachers Manual

Ti ti-15: user guide
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Number Shorthand: Scientific Notation
(Continued)
6. Have students continue to press › and record
the results.
7. Have students analyze their data and make some
conclusions about the scientific notation display.
For example,
1 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10
Explain to students that exponential or scientific
notation is a shorthand for repeated factors:
11
1 x 10
.
8. Have students continue to explore the use of
scientific notation to represent repeated
multiplication by 10 with other starting factors.
(For example, using 2 as the starting factor, the
display
2x10^11
eleven times, or 2 x 10
Collecting and Organizing Data
To focus students' attention on the relevant changes
in the calculator's display, ask questions such as:
What does the display
When did the counter on the left disappear? Why
do you think that happened?
When did the counter on the left reappear? What
else has changed?
The product looks different. It changed from
1000000000 to 1x10^10.
What do the displays look like after this change
takes place?
The 1x10 stays the same, but the right-hand
number (the exponent) goes up one each time
› is pressed, and it matches the left-hand
counter.
© 2000 T
I
EXAS
NSTRUMENTS
represents the product:
1x10^11
represents multiplying 2 by 10
11
.
mean?
3 1000
I
NCORPORATED
.
TI-15: A Guide for Teachers
16

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