Texas Instruments TI15TK Teacher Guide - Page 77
Using memory to find averages
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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. Press 96 T 85 ® W 2 ® Display 96Û85Ú 181 181Þ2Ú 90Ù5 Store to Memory z Add T Memory Recall | z ® M 181Þ2Ú 90Ù5 87 T 98 ® W 2 ® T | ® W 2 ® M 87Û98Ú 185 M 185Þ2Ú 92Ù5 M 92Ù5Û90Ù5Ú 183 M 183Þ2Ú 91Ù5 © 2000 TEXAS INSTRUMENTS INCORPORATED TI-15: A Guide for Teachers 70
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© 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