MATH - SCIENCE INTEGRATION

SCIENTIFIC NOTATION

Using the OGT Calculator for Scientific Notation

You will be provided a calculator to use on the Ohio Graduation Test "OGT" to perform calculations; this will only help you if you know how to use the calculator. Since different types of calculators work a little differently, work through these sections to help familiarize yourself with the calculator you will be using on the OGT test.

• Changing Decimals to Scientific Notation
• To change scientific notation to decimals.
• Operations Using Scientific Notation

Changing Decimals to Scientific Notation

This is an inverse function on the calculator so you will use the     key located in the top row, the second key from the left; and the science [ SCI ] key which is over the    decimal point key located on the bottom row, second key from the left.

• Positive Example
  

  Change 9853.4215 to scientific notation.

  Key strokes:

  Display:   9.8534215 03

  Answer:   9.8534215 x 103

  
  

  
   
• Negative Exponent Example
  

  Change 0.02853 to scientific notation.

  Key Strokes:

  Display:  2.853 –02

  Answer: 2.853 x 10-2

  
  

  
   
• Negative Number Example
  

  To input a negative number key in the number then the  key located on the bottom row the third key from the left.

  Change –78 to scientific notation.

  Key Strokes:

  Display:   -7.8 01

  Answer: -7.8 x 10

  
  

  
   

To change scientific notation to decimals.

You will need to use the exponent  key, located on the fourth row the first key on the left, to key in numbers in scientific notation.   ( Warning:   The calculator will only hold 10 digits, the decimal point doesn’t count,   so if your answer is larger than that it will remain in scientific notion.)

• Positive Decimal and Exponent Example
  

  Change 1.67 x 104 to decimal form.

  Key Strokes:

  Display:  16700

  Answer: 16700

  
  

  
   
• Negative Exponent Example
  

  To input a negative number key in the number then the  key located on the bottom row the third key from the left.

  Change 4.895 x 10-5  to a decimal.

  Key Strokes:

  Display:  0.0004895

  Answer:  0.0004895

  
  

  
   
• Overflow Example
  

  Change 1.295 x 1012

  Key Strokes:

  Display: 1.29512

  Answer: The calculator does not have enough room to display the answer as a decimal, so move                 the decimal point 12 places to the left.    1295000000000

  
  

  
  

  
   

Operations Using Scientific Notation

• Addition
  

  (3.769 x10-4 ) + (6.592 x 10-4)

  Key Strokes:

  Display:  0.0010361

  Decimal Answer:  0.0010361

  To change the answer to scientific notation input

  Display:  1.0361 -03

  Scientific Notation Answer: 1.0361 x 10-3

  
  

  
   
• Subtraction
  

  (-4.72 x 103 ) – (6.81 x 10-2 )

  Key Strokes:

  Display:  -4720.0681

  Decimal Answer:  -4720.0681

  To change the answer to scientific notation input

  Display:  -4.720068103

  Scientific Notation Answer: -4.7200681 x 103

  
  

  
   
• Multiplication
  

  (0.821 x 105 ) x (1.470 x 10)

  Key Strokes:

  Display:  1206870

  Decimal Answer:  1206870

  To change the answer to scientific notation input

  Display:  1.2068706

  Scientific Notation Answer: 1.20687 x 106

  
  

  
   
• Division
  

  Key Strokes:

  Display:  -9073684.211

  Decimal Answer:  -9073684.211

  T o change the answer to scientific notation input

  Display:  -9.07368421106

  Scientific Notation Answer: -9.073684211 x 106