The Fix Key; The Better Batter - The Fix Key - Texas Instruments TI-30X IIS User Manual

The Better Batter — The FIX Key
Overview
% ‚
Students use
numbers to different place values. Students calculate
batting averages using the TI-30X ÙS and then round
their answers to 3 decimal places.
Introduction
1. Have students practice rounding the following
numbers to 3 decimal places using pencil and
paper.
a. 2.35647
b. 15.3633
c. 0.02698
2. Have students round the following numbers to
4 decimal places using the TI-30X ÖS.
a. 4.39865
b. 72.965912
c. 0.29516
d. 0.00395
Activity
Present the following problem to students:
You are going to play Virtual Baseball. You need to
select 9 players from the list to be on your team.
Choose the players with the best batting averages.
Find the batting averages (number of hits ¾ number
of times at bat) rounded to 3 decimal places for each
player. Make a list of your players in order, from
highest to lowest.
See the table on page 3 for solutions.
© 1999 T I
EXAS NSTRUMENTS
on the TI-30X ÙS to change
2.356
15.363
0.027
4.3987
72.9659
0.2952
0.0040
I
NCORPORATED
Math Concepts
• rounding
• place value
• division
• comparing and
ordering decimals
³ 1. Enter the first number.
4.39865
2. Press % ‚ to display
the menu that lets you set
the number of decimal
places.
F0123456789
3. Press
decimal places.
4.39865
4. Press <.
4.39865
TI-30X ÙS: A Guide for Teachers
Materials
• TI-30X ÙS
• pencil
• student
activity
to select 4
4
4.3987
2