Pre-calc notes - Pre-calc notes: Rational Numbers A...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Pre-calc notes: Rational Numbers Irrational Numbers A rational number is one that can be written as a fraction (a ratio) with an integer numerator and an integer denominator other than zero. In set notation, you write The numbers that cannot be written as the ratio of two integers are called the irrational numbers. Examples of irrational numbers are 5.1223344444. .., –3, 101001000. ..., and . The set of rational numbers with the set of irrational numbers forms the set of real numbers R . Operations With Like Signs With Unlike Signs Addition and Subtraction To find the sum of two numbers with the same sign, add their absolute values. The sum has the same sign as the given numbers. For example, 20 + 4 = 24. Note that a b = a + (– b ). That is, subtraction of two numbers can also be seen as addition. For example, 10 – 4 = 6. To find the sum of two numbers with the unlike signs, subtract their absolute values. The answer is positive if the number with the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Pre-calc notes - Pre-calc notes: Rational Numbers A...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online