CALCULATING FORCES OF MOTION

In science, when you are using the formula for acceleration (
acceleration = (final velocity – initial
velocity) / time
) you will solve these equations the same way you would in math class.

On the Ohio Graduation Test "OGT" 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. 
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

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 fractions in your final answer so you do not have to worry about it. 
To input a proper fraction you input the numerator then the fraction key
then the denominator.

Example : 4/9

Key strokes:

Display: 4
9

To input a mixed number 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

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. The calculator 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

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
.

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

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

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 problem to determine how many places you need
after the decimal point.

To add use the which is in the seventh row and the fourth column. 
16 + 142 =

Keystrokes:

Display: 126

4.9 + 17.83 =

Keystrokes:

Display: 22.73

7 9/17 + 14/23 =

Keystrokes:

Display: 8_54
391

Mixed Number: 8
54/391

To convert to an improper fraction, do not clear the display.

Keystokes:

Display: 3182
391

Improper Fraction: 3182/391

To subtract use the which is in the seventh row and the fifth column. Warning: Do not use the for subtraction. 
2  76 =

Keystrokes:

Display: 78

45.36  (24.7) =

Keystrokes:

Display: 70.06

 4/9  8/11 =

Keystrokes:

Display: 1_17
99

Mixed Number: 1
17/99

To convert to an improper fraction, do not clear the display.

Keystokes:

Display: 116
99

Improper Fraction: 116/99

x  a = b

Addition and subtraction problems are the same because you can change
subtraction to addition then change the sign of the next number to the right
to the opposite.

x  19 = 10

can be rewritten as
x + (19) = 10

Solve: Add 19 to both sides of the equation

x
+ (19) + 19 = 10 + 19

Solution: 19 + 19 = 0

so
just x remains on the right hand side of the =

10
+ 19 = 29 so 29 is on the left hand side of the =

x
= 29

Check: Substitute 29 in for x in the original equation. x 19 =
10

29
 19 = 10 and 10 = 10 so
29
is the correct answer.

x  ( 23) =  56

can be rewitten as
x + 23 =  56

Solve: Add  23 to both sides of the equation

x
+ 23 + ( 23) =  56 + ( 23)

Solution: 23 + ( 23) = 0

so
just x remains on the right hand side of the =

 56 + ( 23) =  79 so  79 is on the left hand side of the =

x
=  79

Check: Substitute  79 in for x in the original equation.

x
 ( 23) =  56

 79 
( 23) = 56 and 56 =  56

so
 79
is the correct answer.

Exercise 1: x  15 = 89

Exercise 2: x  (7.63) = 92.56

Exercise 3: x  6/11 = 4/15

Hit next to check your answers.
