Texas Instruments TI-30XIIS Teachers Guide - Page 9
The Better Batter - The FIX Key - calculator
UPC - 033317200849
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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 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 2.356 15.363 0.027 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 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 page 3 for solutions. Math Concepts • rounding • place value • division • comparing and ordering decimals Materials • TI-30X ÙS • pencil • student activity 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