SAS 5 DECIMALS, FRACTIONS, PERCENTAGES

place value

value of a digit based on its position in a number

round off

adjusting a number to make it simpler

ratio

• a comparison of two quantities using division

• shows how many times one value contain

proportion

an equation that states two ratios are equal

SI units

standard system of measurement

metric units

a system of measurement based on the SI system

decimal point

a dot placed between two numbers, used to denote decimals

integers

left of a decimal point

decimal number

right of a decimal point

proper fractions

• are the fractions that in which the numerator is less than its denominator

improper fraction

numerator is more than the denominator

unit fractions

numerator is 1

mixed fraction

mixture if a whole number and a proper fraction

algebraic expression

• contains numbers, variables, and operations

• it does not have an equal sign

algebraic equation

• mathematical statement showing that two expression are equal

• includes an equal sign

algebraic function

• rule that relates an input to an output using algebraic expression

• often written as ( ) where the output depends on the variable

variable

• usually a letter, that represents an unknown or changeable value

coefficient

a number that multiplies a variable in an algebraic expression

exponent

a number that shows how many times to multiply a base by itself

polynomial

an algebraic expression made of terms with variable raised to whole number powers an coefficients

linear equation

an equation whose graph is a straightline