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Full Version: Introduction To Algebra - Numbers
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Before we study algebra, it helps to have a good understanding of the number laws. If you find that you are getting lost in algebra, come back to this chapter for revision.
In this chapter, we learn about:
  • Integers (the whole numbers, plus negative whole numbers)
  • Number properties (where we learn about imaginary and real numbers, rational and irrational numbers, prime numbers and reciprocals)
  • Order of operations (why 3 + 2 × 4 does not equal 20)
  • Powers, roots and radicals (indices)
  • Approximate numbers (significant digits)
  • Scientific notation (for really large and really small numbers)
  • Ratio and proportion (comparing two or more quantities)
  • Pi is a special number in mathematics. 
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