Alegbra

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The order of calculation (or operations ) is

  • Parenthesis
  • Exponents
  • Multiplication
  • Divison
  • Add
  • Subtraction

Remember as PEDMAS, BODMAS or Please Excuse My Darling Aunt Sophie

Substitution

Substitution means putting numbers where letters are. For negative numbers it helps to put () around the calucation to make it less confusing so

--If X=-2 what is 1-X+Xsquared

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