Texas Instruments TI-15 - Page 77

© 2000 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-15: A Guide for Teachers
70
Using memory to find averages
Dai has test scores of 96 and 85.
He has weekly scores of 87 and 98.
Find the average for each group of
scores and the average of his
averages together.
Store to Memory
z
Add
T
Press Display
Memory Recall
96
T
85
®
96Û85Ú 181
|
W
2
®
181
Þ
2Ú 90Ù5
z ®
M
181
Þ
2Ú 90Ù5
87
T
98
®
M
87Û98Ú 185
W
2
®
M
185
Þ
2Ú 92Ù5
T |
®
M
92Ù5Û90Ù5Ú
183
W
2
®
M
183
Þ
2Ú 91Ù5