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TI.15 A Guide for Teachers Developed by Texas Instruments Incorporated Activities developed by Jane Schielack...
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Jane Schielack is an Associate Professor of Mathematics Education in the Department of Mathematics at Texas A&M University. She developed the Activities section and assisted in evaluating the appropriateness of the examples in the How to Use the TI-15 section of this guide. Important Notice Regarding Book Materials...
Rounding The Value of Place Value ...29 Place value What’s the Problem?...34 Number sentences, Problem solving How to Use the TI.15 ... 38 1 Display, Scrolling, Order of Operations, Parentheses ...39 2 Clearing and Correcting ... 42 3 Mode Menus...45 4 Basic Operations ...48...
About the Teacher Guide How the Teacher Guide is Organized This guide consists of two sections: Activities and How to Use the TI-15 . The Activities section is a collection of activities for integrating the TI-15 into mathematics instruction. How To Use the TI-15 is designed to help you teach students how to use the calculator.
EXAS NSTRUMENTS NCORPORATED Menus Two keys on the TI-15 display menus: ‡ and ¢. Press $ or # to move down or up through the menu list. Press ! or " to move the cursor and underline a menu item. To return to the previous screen without selecting the item, press ”.
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Clears pending operations, entries in history, and constants (stored operations). Automatic Power Down If the TI-15 remains inactive for about 5 minutes, Automatic Power Down (APD) turns it off automatically. Press − after APD. The display, pending operations, settings, and memory are retained.
• multiplication • equivalent fractions, decimals, and percents ³ When a student enters a 6 ª, the TI-15 displays 6%. Then, when the student presses ®, the display changes to 6%= 0.06 to show that 6% is another way to write 0.06 or 6/100.
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Fraction Forms Collecting and Organizing Data 1. Have each person in your group set his/her calculator to one of the following combinations of modes for fraction display. (Each person should choose a different setting.) improper/manual simp improper/auto simp mixed number/manual simp mixed number/auto simp 2.
Math Concepts • division • multiplication • fractions • decimals ® to TI-15: A Guide for Teachers Grades 3 - 5 Materials • TI-15 • pencil • student activity (page 14) To display an integer quotient with a remainder, use the £...
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, but that doesn’t make , then fix the decimal , and 586.67 x 6 , which 3520.02 TI-15: A Guide for Teachers When you fix 586.666667 to 2 decimal places, and then multiply by 6, the calculator “remembers”...
When you press › the first time, the calculator performs the operation 1 x 10 and the display shows: 1x10 represents using one time. x 10 TI-15: A Guide for Teachers Materials • TI-15 • pencil • student activity (page 18)
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EXAS NSTRUMENTS NCORPORATED (Continued) , the tables might ÷ 2 Output Output TI-15: A Guide for Teachers ³ To recognize the equivalent procedures, students may need to use the Ÿ key to change outputs from decimal to fraction form or vice versa.
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Collecting and Organizing Data Have your partner secretly enter a measurement with three decimals places into the calculator, and then fix the number to be rounded to the nearest whole number. Now look at the display and answer the following questions: 1.
(for example, 314). 3. Press Œ ’ to see the display. (Using 314, the display is 31í there are 31 tens in 314.) TI-15: A Guide for Teachers Materials • TI-15 • pencil • Counting on Frank by Rod Clement •...
1602. (If students use the – mode to find what digit is in the hundreds place, they will see í displayed to show that 6 is the digit in the hundreds place. TI-15: A Guide for Teachers – . íí...
The Value of Place Value, Part A Collecting and Organizing Data 1. Use your base-ten materials and your calculator to explore how many tens, hundreds, and thousands are in a number. Record your observations in the table. What patterns do you see?
The Value of Place Value, Part B Collecting and Organizing Data 1. Use your base-ten materials and your calculator to explore how many tenths, hundredths, and thousandths are in a number. Record your observations in the table. What patterns do you see?
5 for the equation ? - 10= 5, the calculator displays NO, then shows 5 - 10 < 5, and then returns to the original equation. TI-15: A Guide for Teachers Materials • TI-15 • counters • pencil • student...
Display, Scrolling, Order of Operations, Parentheses Clearing and Correcting Mode Menus Basic Operations Constant Operations Whole Numbers and Decimals Memory Fractions Percent Powers and Square Roots Problem Solving: Auto Mode Problem Solving: Manual Mode Place Value TI-15: A Guide for Teachers...
An entry will always wrap at the operator. Results are displayed right- justified. If a whole problem will not fit on the first line, the result will display on the second line. TI-15: A Guide for Teachers...
Pressing − and ” simultaneously resets the calculator. Resetting the calculator: Returns settings to their defaults. Clears memory and constants. Pressing ” does not affect the mode settings, memory, or constants. TI-15: A Guide for Teachers...
¢ to display the Fractions Mode menu. Press ® after you make your selection, then press ‡ or ¢ again to exit the menu. TI-15: A Guide for Teachers Options Auto 1 2 3 + – x P ? 11-.
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11-. (Displays the number of ones, tens, hundreds, or thousands) 1-. (Displays the digit that is in the ones, tens, hundreds, or thousands place) TI-15: A Guide for Teachers Example Example 1234 For ‘: 12_ _ 1234 For ‘:...
All numbers used with £ must be positive whole numbers. If you attempt to divide by 0, an error message is displayed. T, U, V, W, ®, and £ work with the built-in constants. TI-15: A Guide for Teachers...
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NSTRUMENTS NCORPORATED D i s p l a y 2 Û 5 4 Ü 6 Ú D i s p l a y 3 Ý 4 P 2 Ú TI-15: A Guide for Teachers Add, Subtract Multiply, Divide Equals ®...
(pressing − and ” simultaneously) or by pressing ‡, pressing $ to scroll to the CLEAR menu, selecting OP1 (or OP2) and pressing ®. Pressing − by itself does not clear the constant function. TI-15: A Guide for Teachers...
The examples on the transparency masters assume all default settings. The calculator automatically rounds the result to the number of decimal places selected. (Only the displayed value is rounded. The internally stored value is not rounded.) TI-15: A Guide for Teachers...
The display remains the same. You can store integers, fractions, and decimals in memory. M is displayed anytime a value other than 0 is in memory. To clear the memory, press | twice. TI-15: A Guide for Teachers...
8. § displays the factor (divisor) used to simplify the last fraction result. You must be in Manual mode to use this function. Notes The examples on the transparency masters assume all default settings. TI-15: A Guide for Teachers...
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You will need to clear and begin the entry again. If the decimal place is set to 0, the decimal equivalent for a fraction will not be displayed. TI-15: A Guide for Teachers...
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D i s p l a y ííííí 1 8 S à ¾ á ííííí & à ¾ íííí ííííí & íííí íííí ííí à ¾ TI-15: A Guide for Teachers Numerator Key Denominator Key ¥ Simplify ¤ Factorial §...
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D i s p l a y ¿ » Ä ¸ » Ä ¸ êêêêêê è æ êêêê Ú ííí íííí à ¾ ííí íííí íííí TI-15: A Guide for Teachers Numerator Key Denominator Key ¥ Fraction Modes ¢...
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D i s p l a y ííí ííí 5 Ù 7 5 & íííííí 1 0 0 5 Ù 7 2 Ú 5 Ù 7 2 & ííííí 1 0 0 TI-15: A Guide for Teachers Numerator Key Denominator Key ¥...
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The examples on the transparency masters assume all default settings. Internally, pi is stored to 13 digits (3.141592653590). Only 9 decimal places are displayed. To convert from p to a decimal value, press Ÿ. Nine decimal places are displayed. TI-15: A Guide for Teachers...
(for example 5+2=? or 5+?=7 or 5?2=7). Man (Manual) If the answer is not correct, the TI-15 displays “no” and gives a hint in the form of “<” or “>”. After you enter three incorrect answers, the TI-15 provides the correct answer.
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D i s p l a y ‹ Auto æ è êêêêê ‹ Auto ê ê ë ì ‹ Auto ê ê ë ì ‹ Auto 8 Û Ã Ú 8 0 8 TI-15: A Guide for Teachers Problem Solving ‹ Mode ‡...
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Auto ê ê ë ì ‹ Auto Û Ü Ý Þ Ã ? ê ‹ Auto Û Ü Ý Þ Ã ? ê ‹ Auto 4 Ý 1 Ú Ã TI-15: A Guide for Teachers Problem Solving ‹ Mode ‡...
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2 Û Ã Ú 7 ‹ Auto 2 Û 4 Ú 7 N » ¼ ‹ Auto 2 Û 4 Ç 7 ‹ Auto 2 Û 5 Ú 7 À ¹ ¾ TI-15: A Guide for Teachers Problem Solving ‹ Mode ‡...
(?x?=24 has 8 solutions.) They must be in the form of ?operator?=number. In Problem Solving, you can view the history, but you cannot edit. To exit Problem Solving, press ‹. TI-15: A Guide for Teachers...
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‹ 5 Û Ã Ú 9 1 ¾ ¼ º ‹ 5 Û 3 Ç 9 » ¼ ‹ 5 Û 4 Ú 9 À ¹ ¾ TI-15: A Guide for Teachers Problem Solving ‹ Mode ‡ Missing element ...
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á ‹ Ã Û Ã Ú 3 4 ¾ ¼ º ‹ 2 Û Ã Ú 3 ‹ 2 Û Ï Ú 3 À ¹ ¾ S TI-15: A Guide for Teachers Problem Solving ‹ Mode ‡ Missing element ...
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Problems with no solution The TI-15 calculator is not designed to handle certain types of problems. These will result in a 0 SOL (no solution) response from the calculator. P r e s s ‹‡ " ® ‡ 1 U 2 ®...
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5 Û 4 Ç 1 0 À ¹ ¾ S ‹ Ù 5 È Ù 5 0 » ¼ ‹ Ù 5 Ú Ù 5 0 À ¹ ¾ S TI-15: A Guide for Teachers Problem Solving ‹ Mode ‡ Equals ® Greater Than, Less Than ...
4 " .01 Notes The examples on the transparency masters assume all default settings. The Place Value features work only if you are in Problem Solving Manual mode. To exit Problem Solving completely, press ‹. TI-15: A Guide for Teachers...
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To enter a new number, however, you must press ”, enter the number, and then press Œ again. To exit Place Value, press ” and the TI-15 returns to Problem Solving, Manual mode. How to Use What’s the Digit Function Another way to display place value is to show the digit that is in the ones place, the tens place, etc.
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1 2 3 4 Ù 5 6 7 í í í 4 Ù í í í ‹ ƒ 1 2 3 4 Ù 5 6 7 4 Ü È 1 TI-15: A Guide for Teachers Problem Solving ‹ Place Value Œ...
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3 Ü È 0 Ù 0 1 ‹ ƒ 1 2 3 Ù 4 3 í í 3 Ù í í ‹ ƒ 1 2 3 Ù 4 3 3 Ü È 1 TI-15: A Guide for Teachers Problem Solving ‹ Place Value Œ...
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1 2 3 4 Ù 5 6 7 1 2 í í Ù í í í ‹ ƒ 1 2 3 4 Ù 5 6 7 1 2 3 4 5 6 Ù í . - TI-15: A Guide for Teachers Problem Solving ‹ Place Value Œ...
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á ‹ ƒ 1 2 3 4 Ù 5 6 7 ‹ ƒ 1 2 3 4 Ù 5 6 7 í 2 í í Ù í í í TI-15: A Guide for Teachers Problem Solving ‹ Place Value Œ...
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Clears display and error condition. −” To reset the calculator, hold down − and ” simultaneously for a few seconds and release. MEM CLEARED shows on the display. This will completely clear the calculator, including all mode menu settings, all previous entries in history, all values in memory, and the display.
1 through 1000. If you perform a calculation with a fraction having a denominator greater than 1000, or if the results of a calculation yield a denominator greater than 1000, the TI-15 will convert and display the results in decimal format.
An operator and operand is stored. Op1, Op2 Auto In calculator mode, Auto simplification of fractions to lowest terms is selected. In ‹, Problem Solving function is in Auto mode. Integer division function has been selected (appears only when cursor is over division sign).
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For technical questions, call the Programming Assistance Group of Customer Support: phone: Customers outside the U.S., Canada, Puerto Rico, and the Virgin Islands Contact TI by e-mail or visit the TI Calculator home page on the World Wide Web. e-mail: Internet: Product Customers in the U.S.
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TI strongly recommends that you insure the product for value prior to mailing. Software. Software is licensed, not sold. TI and its licensors do not warrant that the software will be free from errors or meet your specific requirements.