Texas Instruments TI-30X Teachers Guide - Page 6

The Better Batter - The FIX Key - 15 calculators

Get Texas Instruments TI-30X - IIS Scientific Calculator PDF manuals and user guides
UPC - 033317198726
View all Texas Instruments TI-30X manuals
Add to My Manuals
Save this manual to your list of manuals

Page 6 highlights

The Better Batter - The FIX Key Overview Students use % , on the TI-30X ÙS to change numbers to different place values. Students calculate batting averages using the TI-30X ÙS and then round their answers to three decimal places. Math Concepts Materials • rounding • TI-30X ÙS • place value • pencil • division • comparing and ordering decimals • student activity 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 2.356 15.363 0.027 2. Have students round the following numbers to 4 decimal places using the TI-30X ÙS. a. 4.39865 b. 72.965912 c. 0.29516 d. 0.00395 4.3987 72.9659 0.2952 0.0040 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 the next page for solutions. 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 4 to select 4 decimal places. 4.39865 4. Press

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
2
The Better Batter — The FIX Key
Overview
Students use
%
‚
on the TI-30X
Ù
S to change
numbers to different place values. Students
calculate batting averages using the TI-30X
Ù
S and
then round their answers to three decimal places.
Math Concepts
• rounding
• place value
• division
• comparing and
ordering decimals
Materials
• TI-30X
Ù
S
• pencil
• student
activity
Introduction
1.
Have students practice rounding the following
numbers to 3 decimal places using pencil and
paper.
a.
2.35647
2.356
b.
15.3633
15.363
c.
0.02698
0.027
2.
Have students round the following numbers to 4
decimal places using the TI-30X
Ù
S.
a.
4.39865
4.3987
b.
72.965912
72.9659
c.
0.29516
0.2952
d.
0.00395
0.0040
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 the next page for solutions.
‡
1.
Enter the first number.
4.39865
2.
Press
%
‚
to display
the menu that lets you set
the number of decimal
places.
F
0123456789
3.
Press
4
to select 4
decimal places.
4.39865
4.
Press
<
.
4.39865
4.3987