Texas Instruments TI-15 Explorer User Manual

16
9. Problem solving in Manual mode
 Manual problem solving
a. If you are not already in Problem Solving, press the  key to enter Problem Solving.
The  and Auto indicators are displayed, along with a randomly generated problem.
b. Press  to enter the Problem Solving menu. First your score is displayed, and then
the first selection, AUTO MAN. Press  to underline MAN. Press  to confirm your
selection. Press  to exit the menu and return to Problem Solving.
The  indicator is displayed, but not the Auto indicator. You are still in Problem Solving, but
you are in Manual rather than Auto mode. No problem is automatically generated. You can
now enter your own problems.
 Entering your own problems
a. Enter a problem such as        .
There are 25 solutions to the problem.
Note that the calculator will only use positive integers and will
count 1 + 23 as different from 23 + 1.
The process is not algebraic either as the ? can represent different whole numbers.
b. Press  . 2 + ? = 24 is displayed. 2 is one of the numbers that will fit..
c. Press  . 2 + 12 < 24 is displayed along with NO. 2 plus 12 is LESS than 24.
d. The original question appears again. Press  . 2 + ? = 24 is displayed again.
e. Press . 2 + 22 = 24 is displayed along with YES.
2 plus 22 will equal 24.
f. Continue exploring all 25 combinations of integers that, when added together, equal 24.
 Exploring inequalities while in MAN problem solving mode
Press once for LESS THAN, and  for GREATER THAN.
The calculator will indicate whether a statement is correct (YES) or incorrect (NO).
a. Key in 8 + 5 = 10 + 3  (YES is displayed)
b. Key in 16 – 3 < 16 + 3  (YES is displayed)
c. Key in 25 = 12 + 13  (YES is displayed)
d. Key in 6 - 2 > 8  (NO is displayed, then the correct inequality 6 - 2 < 8 YES

Texas Instruments TI-15 Explorer Specifications

General

Brand	Texas Instruments
Model	TI-15 Explorer
Category	Calculator
Language	English

Summary

Introduction to Calculator Display

Clearing and Correcting Entries

Explains how to clear entries and correct errors on the calculator.

Calculator Mode Settings

Calculator Mode

Configures calculator settings for basic calculations, division, and constants.

Problem Solving Mode

Sets up modes for Auto or Manual problem solving and difficulty levels.

Fractions Menu

Sets display options for fractions as mixed numbers or improper fractions.

Basic Operations, Exponents, and Square Roots

Basic Calculator Operations

Covers standard arithmetic, integer division, powers, square roots, and scientific notation.

Three Results of Division

Explains decimal, quotient/remainder, and fraction results for division.

Whole Numbers and Decimal Operations

Using the Fix Key for Decimal Places

Sets the number of decimal places for rounding using the Fix and Place Value keys.

Fraction to Decimal Conversion

Converts fractions to decimals and vice versa using the F÷D key.

Fraction Handling and Simplification

Setting Fraction Display Options

Configures how fractions are displayed (mixed or improper) and simplification settings.

Entering and Converting Fractions

Covers stacked fractions, mixed to improper conversion, and decimal conversion.

Simplifying Fractions

Explains manual and automatic fraction simplification methods and factors.

Percent Calculations

Constant Operations with Op1 and Op2

Storing Operations with Op1 and Op2

How to store and recall operations using Op1 and Op2 keys for repeated use.

Managing Constant Operations

Covers starting, continuing, hiding, and clearing stored constant operations.

Auto Mode Problem Solving

Setting Up Auto Problem Solving

Configures Auto mode, difficulty levels, and problem types for automatic problem generation.

Manual Mode Problem Solving

Entering and Solving Custom Problems

How to input and solve your own mathematical problems in Manual mode.

Exploring Inequalities

Tests and verifies mathematical inequalities using the calculator.

Place Value Exploration

Using Place Value in Manual Mode

Guides on setting up and using the Place Value feature within Manual Problem Solving mode.

Analyzing Digits and Place Value

Explores counting digits in places (hundreds, tenths) and identifying digit values.

Calculator Memory Functions

Using Memory Keys

Details the M and MR/MC keys for storing, recalling, and clearing values in memory.

Error Message Reference

Understanding Display Indicators