92 terms

MATH 7 SOL REVIEW 2011

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ADDING AND SUBTRACTING FRACTIONS
1) Must have COMMON DENOMINATOR
2) SIMPLIFY
MULTIPLYING FRACTIONS
1) Multiply straight across
2) SIMPLIFY
DIVIDING FRACTIONS
1) KEEP, CHANGE, FLIP
2) Multiply straight across
3) SIMPLIFY
PERCENT OF A NUMBER
1) Change percent to decimal
2) Multiply
TIP
Use percent of a number to find tip
ADD tip to original price for final price
SALES TAX
Use percent of a number to find sales tax
ADD tax to original price for final price
DISCOUNT
Use percent of a number to find amount of discount
SUBTRACT discount from original price for final price
SIMPLE INTEREST
I=PRT
P - Principal
R - Interest Rate
T - Time (must be in years)
ABSOLUTE VALUE
the distance a number is from zero
ALWAYS positive
ADDING INTEGERS
3 Methods
1) number line
2) t chart
3) color chips
ZERO PAIRS
positive + negative
SUBTRACTING INTEGERS
1) KEEP, CHANGE, CHANGE (add the opposite)
2) Use addition method
MULTIPLYING AND DIVIDING INTEGERS
1) SAME sign = POSITIVE
2) DIFFERENT sign - NEGATIVE
POSITIVE WORDS
above, rise, increase, up, over, deposit, higher
NEGATIVE WORDS
below, fall, dropped, decrease, down, under, withdraw, lower
PROPORTIONS
a statement that two ratios are equiavalent
*solving - set up rations (label)
cross multiply and solve
RATIO
a comparison of two different numbers
SCALE
a ratio comparing two different units
QUADRILATERALS
4 sided polygon
PARALLELOGRAM
opposite sides parallel and congruent
RECTANGLE
parallelogram with four right angles
RHOMBUS
parallelogram with four congruent sides
SQUARE
paralelogram with 4 right angles and 4 congruent sides
TRAPEZOID
exactly one pair of parallel sides
POLYGON
simple closed figure
regular - all sides and angles are equal
irregular - sides and angles are NOT equal
PENTAGON
5 sides and angles
HEXAGON
6 sides and angles
HEPTAGON
7 sides and angles
OCTAGON
8 sides and angles
NONGAON
9 sides and angles
DECAGON
10 sides and angles
CONGRUENT
same size and shape
SIMILAR
same shape, different size
SIMILAR FIGURES
corresponding sides are proportional
CORRESPONDING
matching
COORDINATE PLANE
X and Y axis
4 Quadrants
ORDERED PAIR
address
(X, Y)
ORIGIN
(0, 0)
TRANSLATION
slide
VERTEX
point where 2 line segments intersect
ROTATION
turn
REFLECTION
mirror image
DILATION
enlaregement or reduction
FRACTION TO DECIMAL
divide
DECIMAL TO PERCENT
move the decimal point TWO places to the RIGHT
PERCENT TO DECIMAL
move the decimal point TWO places to the LEFT
DECIMAL TO FRACTION
write it like you say it (place values)
SIMPLIFY
PERCENT TO FRACTION
put percent over 100
SIMPLIFY
SCIENTIFIC NOTATION
3 parts
1) number - (less than 10, greater than 1)
2) base - (ALWAYS 10)
3) exponent - (positive for numbers greater than 1, negative for numbers less than 1)
ORDER OF OPERATIONS
KING G - grouping symbols
QUEEN E - exponents
PRINCE M & D - multiplication and division (whoever is 1st in line)
PRINCESS A & S - addition and subtraction (whoever is 1st in line)
COMMUTATIVE
order
ASSOCIATIVE
grouping
IDENTIFY
same
INVERSE
opposite

recirpocal - flip the fraction
DISTRIBUTIVE
share
MULTIPLICATIVE PROPERTY OF ZERO
any number multiplied by zero is zero
PERIMTER
distance around - add up all the sides
*fence, border
AREA
number of square units need to cover
*USE CORRECT FORMULA
AREA OF IRREGULAR FIGURES
1) identify the shape
2) divide into shapes we know
3) find the missings sides
4) find the area of each shape
5) add the areas
PERIMETER OF IRREGULAR FIGURES
1) identify the shape (number of sides)
2) find missing sides
3) ADD up ALL sides
ARITHMETIC SEQUENCE
add or subtract the SAME number
that number is the COMMON DIFFERENCE
GEOMETRIC SEQUENCE
multiply or divide the SAME number
that number is the COMMON RATIO
FUNCTION
rule used to generate numbers of a sequence
input/output
EQUATION
must have an equal sign
EXPRESSION
no equal sign
INEQUALITY
a statement that one quantity is greater than or less than another
COEFFICIENT
number in front of a variable
VARIABLE
an unknown quantity
X, Y, N
ADDITION WORDS
plus, more than, increase, sum
SUBTRACTION WORDS
minus decrease, decrease, difference, LESS THAN, SUBTRACTED FROM
MULTIPLICATION WORDS
times, product, of, each
DIVISION WORDS
quotient, into, groups, split, cut, euqal parts
EQUAL SIGN
is, equal to, totals
SOLVING EQUATIONS
1) box in your variable
2) inverse operations (on variable side first)
3) do the SAME THING to the other side (STAY BALANCED)
4) CHECK your answer
SOLVING INEQUALITIES
1) box in your variables
2) inverse operations (on the variable side first)
3) do the SAME THING to the other side (STAY BALANCED)
4) *If you multiply or divide by a NEGATIVE number, you must FLIP THE SIGN for it to remain true
5) CHECK your answer
SURFACE AREA
total area of the faces - USE FORMULA
*completely cover, wrap, all the way around
VOLUME
number of cubic units needed to fill a figure - USE FORMULA
*capacity, fill, hold, full, how much inside
THEORECTICAL PROBABILITY
what we expect to happen
formula -
EXPERIMENTAL PROBABILITY
what actually happens
formula -
LAW OF LARGE NUMBERS
as the number of trials increase, the experimental probability gets closer to the theorectical
FUNDAMENTAL COUNTING PRINCIPLE
multiply the number of choices
TREE DIAGRAMS
shows possibly combinations
MEAN
average - add all numbers and divide
MEDIAN
middle
if there are two, add them and divide by two
MODE
mose frequent
can be one, more than one, or no mode
RANGE
difference between highest and lowest number
FREQUENCY DISTRIBUTION
show how often something occurs using talley marks
LINE PLOT
shows frequency of data on a number line
*can easily find range, mode, and outlies
HISTOGRAM
has consecutive and equal intervals
*bars must touch
SCATTERPLOT
shows trens/relationships
positive
negative
no trend
stays the same
BOX AND WHISKER
4 sections - each 25% of data
5 labels - lower extreme, lower quartile, median, upper quartile, upper extreme
INTERQUARTILE RANGE
difference between upper quartile and lower quartile