NYSTCE CST MATH, Exam Preview
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whole numbers - ✔✔-numbers that tell how many
0,1,2,3,4,5 infinite
cardinal numbers - ✔✔-tell how many (ex. 9 players)
ordinal numbers - ✔✔-
...
NYSTCE CST MATH, Exam Preview
Questions with accurate answers, rated
A+
whole numbers - ✔✔-numbers that tell how many
0,1,2,3,4,5 infinite
cardinal numbers - ✔✔-tell how many (ex. 9 players)
ordinal numbers - ✔✔-tell what order (ex. 1st, 13th, ect)
place value - ✔✔-value of a digit depends on the place it occupies
-millions, hundred thousands, ten thousands, thousands, hundreds, tens, ones
positive exponents - ✔✔-can show repeated multiplication as an exponent, exponent shows how many
times the factor appears
Rules
-7^8x7^6=7^(8+6)
7^8 / 7^6 = 7^(8-6)
rules for exponents - ✔✔--can use rules to multiply or divide exponents with the same base
7^8 x 7^6 = 7^(8+6)
7^8 / 7^6 = 7^(8-6)
scientific notation - ✔✔-uses powers of 10. the power shows how many zeros to use
ex. 10^0=1
10^1=10
10^2=100
10^(-1)=0.1
10^(-2)=0.01
write whole numbers and decimals in scientific notation. use a decimal with one number to the left of
decimal point
2,345= 2.345x10^3
176.8= 1.768x10^2
0.0034= 3.4x10^(-3)
understanding and ordering decimals - ✔✔-decimals used to represent numbers between 0 and 1
tenths, hundredths, thousandths, ten thousandths, hundred thousandths, ect.
rounding - ✔✔-if next digit is more than 5 round up
if next digit is less than 5, round down
rational numbers - ✔✔-numbers that can be written as a fraction, can be written as decimals that
terminate or repeat
1=1/1
.25-1/4
.666666(repeating)=2/3
irrational numbers - ✔✔-numbers cannot be rewritten as a fraction (most famous is pi)
-another famous is square root of 2 (can approx 1.141421356)
undefined numbers - ✔✔-cannot be written?
0 in denominator
1/0?
equivalent fractions - ✔✔-2 fractions that stand for the same number. multiply or divide the numerator
and denominator to dins an equivalent fraction
mixed numbers and improper fractions - ✔✔-to change improper fraction to mixed number, divide by
denomiator and look of excess (write excess as fraction)
to change mixed number to improper fraction multiply denominator and whole number then add to
numerator)
3+2/5 = (3x5)+2 /5= 17/5
integers - ✔✔-negative whole numbers, zero, and positive whole numbers are integers
PEMDAS - ✔✔-(1) parenthesis
(2) exponents
(3) multiplication and division (4) addition and subtraction
key words (addition) - ✔✔-sum, and, more, increased by, how many in all, the total,
key words (subtraction) - ✔✔-less, difference, decreased by, how many left, how much larger, how
many in the rest
key words (multiplication) - ✔✔-of, product, times
key words (division) - ✔✔-per, quotient, shared, ratio
key words (equals) - ✔✔-is, equals
factors - ✔✔-the factors of a number evenly divide the number with no remainder
(the number 1 is a factor in every number, each number is a factor of itself)
least common multiple (LCM) - ✔✔-the multiples of a number are all the numbers you get when you
count by that number
least common is the smallest multiple shared by two numbers
ex. 6 and 8
6: 6,12,18,24,30...
8: 8,16,24,32,...
24 is common, Least common= LCM=24
multiples - ✔✔-are all the numbers you get when you count by that number
ex. 3: 3,6,9,12
greatest common factor (GCF) - ✔✔--largest factor shared between t
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