Texas Instruments TI-73 Teachers Manual page 15

10
Using the TI-73: A Guide for Teachers
1. Measure the strings.
2. Enter the data in
a. Display the List editor.
3
b. If necessary, clear
$ to highlight
: b
c. Starting at the first line in
lengths. (You'll get an error if
Press b after each list item.
3. Find the mean of
a. Return to the Home screen.
- l
b. Access the - v
- v " " [
c. Calculate the mean of
- v Y E b
4. Inform students that the average small intestine is 6m
(20 ft.) long. Ask:
Was the mean you found close to 6m (20 ft.)?
Who had the closest estimate?
Which estimate was off the farthest?
What are some objects that are 6m (20 ft.) long?
If all the strings were connected together, how long do
you think they would be?
5. Find the sum.
a. Return to the Home screen.
- l
b. Access the - v
- v " " J
c. Calculate the sum.
- v Y E b
© 1998 T I
EXAS NSTRUMENTS
on the TI-73.
L
1
.
L
1
L
1
, enter the string
L
1
L
1
.
L
1
MATH menu and select
.
L
1
menu and select
MATH
I
NCORPORATED
is still highlighted.)
mean .
.
sum
Number Sense
Find some objects 6m (20
ft.) long that students are
familiar with in your local
area.