## 15 Jan MATH ALGEBRA BASICS: The Real Numbers

A real number is either positive, negative, or zero. It can be classified as either rational or irrational number. A rational number is one that can be expressed in the form p/q , where p and q are integers and q ≠ 0. The rational numbers consists of the integers, decimals and fractions.

The integers (……-5,-4,-3,-2,-1,0, 1,2,3,4,5……..) positive, negative and zero.

Terminating decimals, such as .222 ….= 2/9, .131313…….. = – 13/99

Fractions ( ¼ , -4/5, 21/4) positive or negative.

The real numbers that are positive and negative nonterminating nonrepeating decimals are called irrational numbers. Examples are:

√2 = 1.414213562……. ∏= 3.141592654……..

Properties of Real Numbers

Above shows a summary, which can help the students to view it all in one glance!

Here’s another tip to remember this easily!

**C – A – I – D * C – I – D**

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