ILTS 305 Math
Number - answer basic building block
integer - answer All whole numbers (both positive and negative) and zero.
prime number - answer A whole number that has exactly two factors, 1 and itself.
composite number - answer A whole number greater than 1 that has more than two
factors.
rational number - answer A number that can be written as a fraction
irrational number - answer a number that can NOT be expressed as a ratio of two
integers or as a repeating or terminating decimal - Pi or any square root of an imperfect
square are considered irrational
Number line - answer
absolute value - answerThe distance a number is from zero on a number line
divisor - answerThe number by which another number is divided.
quotient - answerthe answer to a division problem
Parenthesis - answer
Exponet - answernumber that represents the number of times the base is used as a
factor
root - answera solution of an equation
perfect square - answera square of a whole number
order of operations - answerPEMDAS (parenthesis, Exponents, Multiplication, Division,
Addition, Subtraction)
common factor - answerAny common factor of two or more numbers.
prime factorization - answera number written as the product of all its prime factors
GCF (Greatest Common Factor) - answerthe greatest number that is a factor of two or
more numbers
, least common multiple (LCM) - answerThe smallest multiple (other than zero) that two
or more numbers have in common.
fraction - answerpart of a whole
numerator - answerthe top number in a fraction
denominator - answerThe bottom number in a fraction
equivelent fractions - answerwhen one fraction is equal to another.
common denominator - answerA denominator that is the same in two or more fractions.
Adding and Subtracting Fractions - answermake denominator same number then add or
subtract across
Multiplying Fractions - answer1. Multiply the numerators.
2. Multiply the denominators.
Dividing Fractions - answerTo divide fractions, invert the second one and multiply
Multiplying mixed numbers - answerChange to an improper fraction and multiply; then
change the answer, if in improper form, back to a mixed number and reduce if
necessary.
Example: 3 1/3 x 2 1/4 = 10/3 x 9/4 = 90/12 =
7 6/12 = 7 1/2`
adding and subtracting decimals - answerLine up the decimal points and proceed as
usual
Multiplying Decimals - answerIgnore the decimal point until the answer. Count the
number of Decimal places in both factors. Use that number of decimal places to write
the answer.
Dividing Decimals - answerMove the decimal to the right on both numbers until there is
nothing to the right of the decimal
percentages - answerpart = (percent / 100) x whole
e.g. 7 + 9 + 4 = 20, what % is 4 of whole.
4/20 = (4x5)/(20x5) = =20%
direct proportion - answera relationship between two variables in which their ratio is
constant
Number - answer basic building block
integer - answer All whole numbers (both positive and negative) and zero.
prime number - answer A whole number that has exactly two factors, 1 and itself.
composite number - answer A whole number greater than 1 that has more than two
factors.
rational number - answer A number that can be written as a fraction
irrational number - answer a number that can NOT be expressed as a ratio of two
integers or as a repeating or terminating decimal - Pi or any square root of an imperfect
square are considered irrational
Number line - answer
absolute value - answerThe distance a number is from zero on a number line
divisor - answerThe number by which another number is divided.
quotient - answerthe answer to a division problem
Parenthesis - answer
Exponet - answernumber that represents the number of times the base is used as a
factor
root - answera solution of an equation
perfect square - answera square of a whole number
order of operations - answerPEMDAS (parenthesis, Exponents, Multiplication, Division,
Addition, Subtraction)
common factor - answerAny common factor of two or more numbers.
prime factorization - answera number written as the product of all its prime factors
GCF (Greatest Common Factor) - answerthe greatest number that is a factor of two or
more numbers
, least common multiple (LCM) - answerThe smallest multiple (other than zero) that two
or more numbers have in common.
fraction - answerpart of a whole
numerator - answerthe top number in a fraction
denominator - answerThe bottom number in a fraction
equivelent fractions - answerwhen one fraction is equal to another.
common denominator - answerA denominator that is the same in two or more fractions.
Adding and Subtracting Fractions - answermake denominator same number then add or
subtract across
Multiplying Fractions - answer1. Multiply the numerators.
2. Multiply the denominators.
Dividing Fractions - answerTo divide fractions, invert the second one and multiply
Multiplying mixed numbers - answerChange to an improper fraction and multiply; then
change the answer, if in improper form, back to a mixed number and reduce if
necessary.
Example: 3 1/3 x 2 1/4 = 10/3 x 9/4 = 90/12 =
7 6/12 = 7 1/2`
adding and subtracting decimals - answerLine up the decimal points and proceed as
usual
Multiplying Decimals - answerIgnore the decimal point until the answer. Count the
number of Decimal places in both factors. Use that number of decimal places to write
the answer.
Dividing Decimals - answerMove the decimal to the right on both numbers until there is
nothing to the right of the decimal
percentages - answerpart = (percent / 100) x whole
e.g. 7 + 9 + 4 = 20, what % is 4 of whole.
4/20 = (4x5)/(20x5) = =20%
direct proportion - answera relationship between two variables in which their ratio is
constant
