Math Formula Sheet - GED

2014 GED? Test Resources

Mathematics Formula Sheet & Explanation

The 2014 GED? Mathematical Reasoning test contains a formula sheet, which displays formulas

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are provided of formulas.

to

test-

Area of a:

square

A = s2

rectangle

A = lw

parallelogram

A = bh

triangle trapezoid circle

A = !! bh

A

=

! !

h(b1

+

b2)

A = r2

Perimeter of a:

square rectangle triangle Circumference of a circle

P = 4s P = 2l + 2w P = s1 + s2 + s3 C = 2r OR C = d; 3.14

Surface area and volume of a:

rectangular prism right prism cylinder pyramid cone sphere

Data

mean

median

Algebra

slope of a line

slope-intercept form of the equation of a line

point-slope form of the equation of a line

standard form of a quadratic equation

SA = 2lw + 2lh + 2wh

V = lwh

SA = ph + 2B

V = Bh

SA = 2rh + 2r2

V = r2h

SA = ! ps + B

!

V = ! Bh

!

SA = rs + r2

V = ! r2h

!

SA = 4r2

V = ! r3

!

(p = perimeter of base with area B; 3.14)

mean is equal to the total of the values of a data set, divided by the number of elements in the data set

median is the middle value in an odd number of ordered values of a data set, or the mean of the two middle values in an even number of ordered values in a data set

!

=

!! !!

- -

!! !!

y = mx + b

y ? y1 = m(x ? x1) y = ax2 + bx + c

quadratic formula Pythagorean theorem

-! ? !! - 4!"

!=

2!

a2 + b2 = c2

simple interest

distance formula total cost

I = Prt (I = interest, P = principal, r = rate, t = time) d = rt

total cost = (number of units) ? (price per unit)

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2014 GED? Test Resources

TI-30XS Calculator Reference Sheet

The calculator reference sheet is provided on most items on the 2014 GED? Mathematical Reasoning Mathematical Reasoning test, as well as certain items on the Scientific Reasoning and Social Studies tests. The calculator reference sheet is provided to test-takers in order to demonstrate the functionality of the onscreen calculator, specifically in terms of what order to click the buttons in complex problems, such as order of operations or calculating with fractions.

BASIC ARITHMETIC

To perform basic arithmetic, enter numbers and operation symbols using the standard order of operations.

EXAMPLE

8 4 7

The correct answer = -25

.

PERCENTAGES

To calculate with percentages, enter the number, then

.

EXAMPLE

40% 560

The correct answer = 224

.

To perform calculations with scientific notation, use the

EXAMPLE

7.8 108 1.5 108

key.

SCIENTIFIC NOTATION

.

To perform calculations with fractions, use the formatted in reduced form.

EXAMPLE

2 9

3 7

The correct answer = 630000000 key. The answer will automatically be

FRACTIONS

The correct answer =

.

MIXED NUMBERS

To perform calculations with mixed numbers, use

.

As with fractions, the answer will automatically be formatted in reduced form.

EXAMPLE

12

5 6

1

1 2

POWERS AND ROOTS

The correct answer =

.

To perform calculations with powers and roots, you will use the following keys:

EXAMPLE

1.22

EXAMPLE

74

EXAMPLE

529

EXAMPLE

31728

.

The correct answer = 1.44 The correct answer = 2401

The correct answer = 23 The correct answer = 12

The answer toggle key

can be used to toggle the display result between fraction and

decimal answers, exact square root and decimal, and exact pi and decimal.

EXAMPLE

9 10

The correct answer = 0.9

.

TOGGLE KEY

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