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Texas Instruments TI15TK Teacher Guide - Page 108

Problems with one solution, Problem Solving, Missing element

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Problems with one solution Problems with one solution are equations with one missing element (for example 7+2=? or 7+?=9). Enter a problem and find a solution. Press ‹ ‡ Display ‹ Auto è Problem Solving ‹ Mode ‡ Missing element " ® ‹ Auto æ êè êêê ‡ ‹ á 5 U 3 ® ® 2 ® 5 T ® 9 ® 3 ® 4 ® ‹ 5Ü3ÚÃ 1 ¾¼º ‹ 5Ü3Ú2 À¹¾ ‹ 5ÛÃÚ9 1 ¾¼º ‹ 5Û3Ç9 »¼ ‹ 5Û4Ú9 À¹¾ © 2000 TEXAS INSTRUMENTS INCORPORATED TI-15: A Guide for Teachers 101

Section	Page
Front Matter	1
Title Page	2
Table of Contents	4
About the Teacher Guide	5
About the TI.15	6
Activities	8
Patterns in Percent	9
Fraction Forms	13
Comparing Costs	18
Number Shorthand: Scientific Notation	22
Related Procedures	27
In the Range	31
The Value of Place Value	36
What’s the Problem?	41
How to Use the TI-15	45
1: Display, Scrolling, Order of Operations, and Parentheses	46
Equation Operating System	47
Order of Operations	48
2:Clearing and Correcting	49
Clearing entries	50
Correcting entry errors	51
3: Mode Menus	52
4: Basic Operations	55
Entering negative numbers	57
Division with remainders	58
Division with decimal result	59
Division with fractional result	60
Calculating equivalent units of time	61
5: Constant Operations	62
Addition as “counting on”	63
Multiplication as “repeated addition”	64
Powers as “repeated multiplication”	66
Using [^] as a constant	67
Using OP 1 and OP 2 together	68
Clearing constant operations	69
6: Whole Numbers and Decimals	70
Setting the number of decimal places	72
Addition with money	73
Converting decimals to fractions	74
7: Memory	75
Using memory to add products	76
Using memory to find averages	77
8: Fractions	78
Adding mixed numbers	80
Simplifying fractions	81
Converting fractions to decimals	83
Converting decimals to fractions	84
Conv e r t i ng between fractions and mixed numbers	85
Comparing fractions and decimals	86
9: Percent	87
Converting with percent	88
Conver ti ng with fractions, decimals, and percent	89
Calculating tips	90
10: Pi	91
Using pi to find circumference	92
Using pi to find area	93
Using pi to find volume	94
11: Powers and Square Roots	95
Finding the area of a square	96
Finding the square root	97
Calculating powers	98
Calculating negative powers	99
Using powers of 10	100
12: Problem Solving: Auto Mode	101
Select level of difficulty	102
Select type of operation	103
Test your skills	104
View the Scoreboard	105
Find the operator	106
13: Problem Solving: Manual Mode	107
Problems with one solution	108
Problems with more than one solution	109
Problems with no solution	110
Less than, greater than, equals	111
View Scoreboard	112
14: Place Value	113
Determine place value	115
Repeated digits	116
How many?	117
What’s the digit?	118
Appendices	119
A: Quick Reference to Keys	119
B: Display Indicators	123
C: Error Messages	124