Orela Math Flashcards
commutative property
the product is the same regardless of the order of factors
example - 24 = 42
associative property
the product is the same regardless of grouping
example - (2*5) 3 = 2 * (53)
distributive property
multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products
example - 2* (3+4) = (23) + (24)
zero property
the sum of a number and 0 is that number in multiplication, the product of a number and 0 is 0
composite number
a whole number greater than 1 that has more than 2 different factors, not a prime number
rational numbers
the set of whole numbers, integers, decimals, and fractions (terminiating decimals)
Irrational numbers
cannot be written in fractions and decimals
Real numbers
the set of all rational and irrational numbers
bar graph
uses bars to compare data
line graph
used to show how information increases or decreases over time
to find the percent of a number
you need to know the number of the part and the number of the whole
remember might be easier to use decimals
finding speed
the measurement of distance moved over time
rate of speed = distance / time
calculating interest
simple interest - principle *rate of interest *time/100
compound interest - principle * 1(interest rate^time - principle
quadratic equation
ax^2 + bx +c=0
quadratic formula
x= - b +- the square root of b^2 - 4ac/2a
Euler’s theorem
V-E +F = 2
trapezoid area
a = 1/2 (a+b) * h
area of a circle
a = pi * r^2
Area of a sphere
a = 4pi*r^2
pie chart
compare parts of a whole
percents - decimals
divide by 100 remove percents
decimals to percents
multiply by 100
fraction to a decimal
divide top by bottom number
fraction to a percentage
divide top number by bottom number multiply by 100
percentage to a fraction
percentage to a decimals then to a fraction
formula to find the diagnols of a shape
n( n -3)/2
n = the number of sides on the shape
inverse equation
y= k/x
