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6
Using the TI-73: A Guide for Teachers
Number Sense
© 1998 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Activity
—
Part A
Whole ClassWhole Class
1. Demonstrate to your students how to roll dice on the
TI-73 to get 4 numbers. Record the 4 numbers.
a. Go to the Home screen.
- l
b. Select
dice
from the
MATH PRB
menu, and paste it
to the Home screen.
1 " " J
c. Enter the number of dice you want to roll at one
time.
Q E b
You now have 4 numbers.
d. Record the 4 numbers on the transparency.
2. Have students use each of the 4 numbers once, along
with any operations symbols (and grouping symbols,
when needed), to write an expression that has a value
of 1.
Example If your 4 numbers were
{4 3 4 5}
, an
expression would be 1 = (5 - 3) - (4/4).
3. Record one of these expressions on the transparency.
Ask if anyone has a different expression. Record these,
also.
4. Repeat this procedure to write an expression equal to
2.
5. Continue the demonstration until students understand
what to do.
Students may use the TI-73 to find the expression or to
check the value of the expression.
Example If the 4 numbers are
{4 3 4 5}
, and
the expression is 1 = (5 - 3) - (4/4),
then enter
D R T [ E T
D Q F Q E b.