Calculator

Calculator


Basics
The TI-30XS MultiView Calculator, pictured above, is the official on-screen calculator of the GED.  As a supplement to the on-screen calculator, you should bring your own handheld calculator for use in the test.  Like the on-screen calculator, your handheld calculator must be a TI-30XS Multiview Scientific Calculator.  No other brand of handheld calculator is allowed.

You should purchase the TI-30XS MultiView Calculator for practicing and studying prior to the test.  The TI-30XS MultiView Calculator is available for under $20.00 from many vendors, including AmazonBest BuyOffice DepotStaples, and Walmart, to name a few.

Several instructional materials regarding the calculator are provided by the GED Testing Service for your use prior to the test:
Calculator Tutorial
• Calculator Demo Video #1 (Pre-Test)
• Calculator Demo Video #2 (Pre-Test)

A calculator reference sheet is provided for your use during the test:
• Calculator Reference Sheet (During Test)

The calculator is utilized mainly in the Mathematical Reasoning module, but also sees action in the Science and Social Studies modules.


Clearing
clear
At the start of a new calculation, clear the screen.
If you make an error entering a calculation, start over and clear the screen.
When in doubt, start over and clear the screen.

Calculator Click What You See Comment
clear blinker clears screen
Clearing


Number Sense
Number Sense means knowing your way around numbers.

Number Sense’s core skills involve addition, subtraction, multiplication, and division.

Calculator Click What You See Comment
clear blinker clears screen
5 + 3 5+3 Addition
enter 8 Answer
clear blinker clears screen
6 – 4 6-4 Subtraction
enter 2 Answer
clear blinker clears screen
5 × 7 5*7 Multiplication
enter 35 Answer
clear blinker clears screen
72 ÷ 8 72÷8 Division
enter 9 Answer
Number Sense


Negatives

(-)
The (-) button is used for calculating with negative numbers (numbers less than zero).

Calculator Click What You See Comment
clear blinker clears screen
5 + (-) 3 5+ 3 Addition
enter 2 Answer
clear blinker clears screen
6 – (-) 4 6- 4 Subtraction
enter 10 Answer
clear blinker clears screen
5 × (-) 7 5* 7 Multiplication
enter 35 Answer
clear blinker clears screen
72 ÷ (-) 8 72÷ 8 Division
enter 9 Answer
Negatives


Decimals

decimal
The decimal button is used frequently.

Calculator Click What You See Comment
clear blinker clears screen
5 + decimal 3 5+.3 Addition
enter 5.3 Answer
clear blinker clears screen
6 – decimal 4 6-.4 Subtraction
enter 5.6 Answer
clear blinker clears screen
5 × decimal 7 5*.7 Multiplication
enter 3.5 Answer
clear blinker clears screen
72 ÷ decimal 8 72÷.8 Division
enter 90 Answer
Decimals


Percent

%

2nd activates % above (

% is primarily a multiplier.

Calculator Click What You See Comment
clear blinker clears screen
2nd % × 3 5%*3 Multiplication
enter 0.15 Answer
Percent


Fractions
fraction
A calculator operation with fractions produces an answer in fraction form.

Calculator Click What You See Comment
clear blinker clears screen
fraction 1 down 2 right + fraction 1 down 4 right \bf\displaystyle\frac{1}{2} + \bf\displaystyle\frac{1}{4} Addition
enter \bf\displaystyle\frac{3}{4} Answer
clear blinker clears screen
fraction 1 down 2 right – fraction 1 down 4 right \bf\displaystyle\frac{1}{2} – \bf\displaystyle\frac{1}{4} Subtraction
enter \bf\displaystyle\frac{1}{4} Answer
clear blinker clears screen
fraction 1 down 2 right × fraction 1 down 4 right \bf\displaystyle\frac{1}{2} * \bf\displaystyle\frac{1}{4} Multiplication
enter \bf\displaystyle\frac{1}{8} Answer
clear blinker clears screen
fraction 1 down 2 right ÷ fraction 1 down 4 right \bf\displaystyle\frac{1}{2} ÷ \bf\displaystyle\frac{1}{4} Division
enter 2 Answer
Fractions


Mixed Fractions (also known as Mixed Numbers)
mixed number

2nd activates mixed number above fraction

A calculator operation with mixed fractions produces an answer in fraction form.

Calculator Click What You See Comment
clear blinker clears screen
2nd mixed number 1 right 1 down 2 right +
2nd mixed number 1 right 1 down 4 right
\bf\displaystyle1\frac{1}{2} + \bf\displaystyle1\frac{1}{4} Addition
enter \bf\displaystyle\frac{11}{4} Answer
clear blinker clears screen
2nd mixed number 1 right 1 down 2 right –
2nd mixed number 1 right 1 down 4 right
\bf\displaystyle1\frac{1}{2} – \bf\displaystyle1\frac{1}{4} Subtraction
enter \bf\displaystyle\frac{1}{4} Answer
clear blinker clears screen
2nd mixed number 1 right 1 down 2 right ×
2nd mixed number 1 right 1 down 4 right
\bf\displaystyle1\frac{1}{2} * \bf\displaystyle1\frac{1}{4} Multiplication
enter \bf\displaystyle\frac{15}{8} Answer
clear blinker clears screen
2nd mixed number 1 right 1 down 2 right ÷
2nd mixed number 1 right 1 down 4 right
\bf\displaystyle1\frac{1}{2} ÷ \bf\displaystyle1\frac{1}{4} Division
enter \bf\displaystyle\frac{6}{5} Answer
Mixed Numbers


Square
square
Number Squared = Number² = Number × Itself

3 squared = 3² = 3 × 3 = 9

In order to get the correct answer when squaring a negative number, place the negative number in parentheses to protect the order of operations.
Right:  -3 squared = (-3)² = 9
Wrong:  -3 squared = -3² = -9

Calculator Click What You See Comment
clear blinker clears screen
square 3 squared
enter 9 Answer
clear blinker clears screen
( -3 ) square  (-3)² -3 squared

Parentheses protect order of operations.
enter  9 Answer
Number²


Square Root
square root

2nd activates square root above square

Square Root = Number² = √Number × Itself 

Square Root of 9 = 9 =  = √3 × 3 = 3

Sometimes, by using factoring, the calculator will produce an answer that retains the square root symbol:
Square Root of 48 = 43

When an answer shows    immediately adjacent to a number, an invisible multiplication sign is in force:
4 × 3  =  4√3

The root sign √   is also known as the radical sign.

Calculator Click What You See Comment
clear blinker clears screen
2nd square root 9

9

Square Root of 9
enter 3 Answer
clear blinker clears screen
2nd square root 48

48

Square Root of 48
enter

4√3

Answer
Square Root


Power
power
NumberPower

The term power refers to how many times a number is multiplied by itself.
7 to the power of 5 = 75 = 7 × 7 × 7 × 7 × 7 = 16807
7 to the power of -5 = 7-5 = \bf\displaystyle\frac{1}{7} × \bf\displaystyle\frac{1}{7} × \bf\displaystyle\frac{1}{7} × \bf\displaystyle\frac{1}{7} × \bf\displaystyle\frac{1}{7} = 0.000059499

In order to get the correct answer when calculating the power of a negative number, place the negative number in parentheses to protect the order of operations.
Right:  -7 to the power of 4 = (-7)4 = 2401
Wrong:  -7 to the power of 4 = -74 = -2401

Calculator Click What You See Comment
clear blinker clears screen
power 4 74 7 to the power of 4
enter 2401 Answer
clear blinker clears screen
( -7 ) power 4 (-7)4 -7 to the power of 4

Parentheses protect order of operations.
enter 2401 Answer
Power


Root
root

2nd activates root above power

RootNumber

The root sign √   is also known as the radical sign.

Third Root of 343  =  ³343  =  ³√  =  ³√7 × 7 × 7 = 7
Fourth Root of 2401  =  42401  =  474  =  47 × 7 × 7 × 7 = 7
Fifth Root of 16807  =  516807  =  575  =  57 × 7 × 7 × 7 × 7 = 7

Calculator Click What You See Comment
clear blinker clears screen
2nd root 343

³343

Third Root of 343
enter 7 Answer
Root


Scientific Notation
scientific notation
Scientific notation is used to represent large or small numbers as a power of ten.

1 × 106 = 1000000
7 × 106 = 7000000

1 × 10-6 = 0.000001
7 × 10-6 = 0.000007

In order to get the correct answer with division involving scientific notation, parentheses are needed to protect the order of operations.
Right:  (7 × 106) ÷ (2 × 106) = 3.5
Wrong:  7 × 106 ÷ 2 × 106 = 3.5 × 1012

Calculator Click What You See Comment
clear blinker clears screen
scientific notation 6 7*106 Scientific Notation
clear blinker clears screen
scientific notation 6 right +
scientific notation 6 right
7*10+ 2*106 Addition
enter 9000000 Answer
clear blinker clears screen
scientific notation 6 right –
scientific notation 6 right
7*10– 2*106 Subtraction
enter 5000000 Answer
clear blinker clears screen
scientific notation 6 right ×
scientific notation 6 right
7*10* 2*106 Multiplication
enter 1.4*1013  Answer
clear blinker clears screen
( 7 scientific notation 6 right ) ÷
( 2 scientific notation 6 right )
(7*106) ÷ (2*106) Division

Parentheses protect order of operations.
enter 3.5 Answer
Scientific Notation


π

π
π represents the ratio of a circle’s circumference to its diameter (approximately 3.14).
π is also known as pi.
π is primarily a multiplier.

When an answer shows π immediately adjacent to a number, an invisible multiplication sign is in force:
5 × π = 5π

Calculator Click What You See Comment
clear blinker clears screen
5 × π 5*π
enter Answer
π


Toggle

toggle
The toggle button enables switching between results:
fraction ⇔ decimal
square root ⇔ decimal
π ⇔ decimal

Calculator Click What You See Comment
clear blinker clears screen
fraction 1 down 4 right \bf\displaystyle\frac{1}{4}
enter \bf\displaystyle\frac{1}{4}
toggle 0.25 Toggle
toggle \bf\displaystyle\frac{1}{4} Toggle
clear blinker clears screen
2nd square root 48

48

enter

4√3

toggle 6.928203230276 Toggle
toggle

4√3

Toggle
clear blinker clears screen
π π
enter π
toggle 3.1415922654 Toggle
toggle π Toggle
Toggle

About Scott Solomon

HowtoPasstheGED.com gears up adult learners for the recently redesigned, newly computerized GED. ScottSolomon.com delves into my literary fiction.
This entry was posted in (1) Toolbox, (I) The GED, (III) Mathematical Reasoning and tagged , , , , , , . Bookmark the permalink.

4 Responses to Calculator

  1. Peg Harvey says:

    I am trying to start a GED prep class and appreciate your resources.

    Like

  2. Hi, Peg

    Good luck with your class. Let me know if there’s anything more I can do to help.

    Scott

    Like

  3. ! says:

    thankyou for the breakdown on the calculator! i have been struggling on learning how to navigate it! thankyou!

    Like

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