New News Maths #1

Types of Numbers

Rational Numbers = any number having a limited number of decimal places

Integer = a whole number

Example: -110, 0, 53

Fractions = parts of a whole number

Example: 5/8, -1/4; The upper number is the numerator, the lower one is the denominator

Decimals

Recurring = continues indefinitely

Example: o.66666666666... (goes on forever) = 0.6 (a dot on the recurring decimal)

Example: 0.123123123123... (goes on forever) = 0.123 (dot on the first & last recurring decimal digits; 1 & 3)

Terminating = limited decimal place

Example: 0.5, 0.7526

Irrational Number = continues forever

• decimals continue forever

• does not repeat

Surd = square roots of non-square numbers

Example: √2 = 1.1414213... (continues forever)

Incorrect example: √9=3 (9 is a square number, so the square root of 9 isn’t a surd)

Pi (π) = 3.1415926535897932384... (continues forever)