Texas Instruments TI-73TP Teachers Guide - Page 10

Dice Digits

Page 10 highlights

5 Activity 2 Dice Digits Students use 4 numbers, any operations, and grouping symbols to write mathematical expressions that are equal to each of the numbers 1 through 9. Number Sense ♦ order of operations ♦ mental math ♦ basic computation Materials ♦ student activity sheet (provided) ♦ transparency of activity sheet ♦ TI-73 ³ Setup If your TI-73s have not been used for random number generation prior to this activity, you and your students need to store an integer "seed value" to rand in each TI-73. With each rand execution, the TI-73 generates the same random-number sequence for a given seed value. The TI-73 factory-set seed value for rand is 0. To generate a different random-number sequence, store any non-zero seed value to rand. Á If you do not enter a seed value, rand uses whatever value happens to be the current seed. If there is no seed, it uses the factoryset value of 0. 1. Enter the number you want for your seed value. Have students use different seed values. (In the example shown at the right, 1 is used.) 2. Now press X 1 " " 1 b 1 " " 1 b b. (For more information about seed values, refer to the "1 Probability Menu" section in the Math chapter of the TI-73 Guidebook .) Á If you want to restore the factory-set seed value, store 0 to rand or reset the defaults. © 1998 TEXAS INSTRUMENTS INCORPORATED

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5
© 1998 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Activity 2
Dice Digits
Students use 4 numbers, any operations, and grouping
symbols to write mathematical expressions that are
equal to each of the numbers 1 through 9.
Number Sense
order of operations
mental math
basic computation
Materials
student activity sheet (provided)
transparency of activity sheet
TI-73
³
Setup
If your TI-73s have not been used for random number
generation prior to this activity, you and your students
need to store an integer “seed value” to
rand
in each TI-73.
With each
rand
execution, the TI-73 generates the same
random-number sequence for a given seed value. The
TI-73 factory-set seed value for
rand
is
0
. To generate a
different random-number sequence, store any non-zero
seed value to
rand
.
If you do not enter a seed
value,
rand
uses whatever
value happens to be the
current seed. If there is no
seed, it uses the factory-
set value of
0
.
1.
Enter the number you want for your seed value. Have
students use different seed values. (In the example
shown at the right,
1
is used.)
2.
Now press
X
1
"
"
1
b
1
"
"
1
b
b
.
(For more information about seed values, refer to the
1
Probability Menu” section in the Math chapter of
the
TI-73 Guidebook
±
.)
If you want to restore the
factory-set seed value,
store
0
to
rand
or reset
the defaults.