MATH - SCIENCE INTEGRATION

bullet1 SOLVING ONE STEP EQUATIONS

bullet2 Using the Calculator

On the Ohio Graduation Test you will be allowed to use the calculator provided for the test.  In this section you can review the basic operations with the calculator as well as how to input negative numbers and fractions.


bullet3 Negative Numbers

To input a negative number you use the  key in the last row to the left of the  key. You input the number first then the  key.
Warning: Do not use the subtraction key  for negative numbers.
 
Example:  -75.93
 
Keystrokes:  
 
Display:  -75.93


bullet3 Fractions

With the OGT calculator you will use the fraction key  to perfrom operations with fractions, when you want a fractional answer.  It is in the third row and the fifth column.  This will allow you to input fractions, both proper and improper, and mixed numbers.  Your solution will be a proper fraction or mixed number but you can also change from a mixed number to an improper fraction.
The OGT calculator will also reduce all fraction in your final answer so you do not have to worry about it.


  • Proper Fractions
    To input a proper fraction you input the numerator then the fraction key  then the denominator.
     
    Example :  4/9
     
    Key strokes:
     
    Display:  4  9



     
  • Mixed Numbers
    To input a mixed you input the integer then the fraction key ,the numerator then the fraction key , and then the denominator.  
     
    Example: 5 19/21
     
    Keystrokes:  
     
    Display:  5_19  21



     
  • Improper Fractions
    You input an improper fraction the same way you do a proper fraction.  To input an improper fraction you input the numerator then the fraction key  then the denominator. But the calculatr will turn it to a mixed number.
     
    Example:  11/6
     
    Keystrokes:  
     
    Display:  11  6
     
    Hit any operation key and the calculator will convert the improper fraction to a mixed number.
     
    Display:  1_5  6
     



     
  • Converting
    To convert between mixed numbers and improper fractions you will use the inverse key   which is the second key in the first row, and the fraction key  .  



     
    • Improper Fraction to Mixed Number
      Change 8/5 to a mixed number.
       
      Key strokes:  
       
      Display:  1_3  5
       
      Mixed Number: 1  3/5
       
      To convert back to an improper fraction do not clear the display.
      Keystrokes:  
       
      Display:  8  5



       
    • Mixed number to Improper Fraction
      Convert 13 9/11  to an improper fraction.
       
      Key Strokes:
       
      Display:  152  11
       
      Improper Fraction:  152/11
       
      To convert back to a mixed number do not clear the display.
      Key strokes:
       
      Display:  13_ 9 11



       
  • Fraction to decimal
    If you need a decimal answer from a fraction, remember all fractions are division problems, so input it as a division problem.
     
    Example:  Change 5/6 to a decimal
     
    Keystrokes:
     
    Display:  0.833333333
     
    Read the directions from the proplem to determine how many places you need after the decimal point.
     
     
     



     

bullet3 Addition

To add use the   which is in the seventh row and the fourth column.


  • Integer
    -16 + 142 =
     
    Keystrokes:    
     
    Display:  126



     
  • Decimal
    4.9 + 17.83 =
     
    Keystrokes:
     
    Display:  22.73



     
  • Fraction
    -7 9/17 + 14/23 =
     
    Keystrokes:  
     
    Display:  8_54  391
     
    Mixed Number:  8 54/391
     
    To covert to an improper fraction, do not clear the display.
    Keystokes:  
     
    Display:  3182  391
     
    Improper Fraction:  3182/391
     
     



     

bullet3 Subtraction

To subtract use the   which is in the seventh row and the fifth column.
Warning: Do not use the  for subtraction.


  • Integer
     
    -2 - 76 =
     
    Keystrokes:  
     
    Display:  -78



     
  • Decimal
    45.36 - (-24.7) =
     
    Keystrokes:
     
    Display:  70.06



     
  • Fraction
    - 4/9 - 8/11 =
     
    Keystrokes:  
     
    Display:  -1_17  99
     
    Mixed Number:   -1 17/99
     
    To covert to an improper fraction, do not clear the display.
    Keystokes:  
     
    Display:  -116  99
     
    Improper Fraction:  -116/99



     

bullet3 Multiplication

To multiply use the  key   which is in the sixth row and the fourth column.


  • Integer
    -72 x (- 89) =
     
    Keystrokes:  
     
    Display:  6408



     
  • Decimal
    4.6 x 8.62 =
     
    Keystrokes:  
     
    Display:  39.652



     
  • Fraction
    9/5 x 15/18 =
     
    Keystrokes:  
     
    Display:  1_1  2
     
    Mixed Number:  1 1/2
     
    To covert to an improper fraction, do not clear the display.
    Keystokes:  
     
    Display:  3  2
     
    Improper Fraction:  3/2



     

bullet3 Division

To divide use the  key   which is in the sixth row and the fifth column.


  • Integer
    16 I - 44 =
     
    Keystrokes:  
     
    Display:  0.363636363
     
    Decimal Form:  0.36
     
    If you need your answer in fractional form you can use the   insted of the   key.
     
    Keystrokes:  
     
    Display:  - 4  11
     
    Fractional Form:  - 4/11



     
  • Decimal
    34.01 I 16 =
     
    Keystrokes:  
     
    Display:  2.125625
     
    Make sure you read the directions of each problem carefully so you will know what decimal place to round your answer to.



     
  • Fraction
    -15 I 5/9 =
     
    Keystrokes:  
     
    Diplay:  27