The main operations

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Across
  1. 1. The third power of a quantity.
  2. 4. ...multiplied by...
  3. 7. Not exact, but close enough to be used / To estimate.
  4. 8. ...divided by...
Down
  1. 1. To work out an answer, usually by adding, multiplying etc.
  2. 2. To use the rules of arithmetic and algebra to rewrite an expression to make it make less complex or complicated.
  3. 3. When we remove the ( ).
  4. 5. Result of multiplying a number by itself.
  5. 6. Symbols used in pairs to group things together / Parenthesis.