Mathematics with Double Digits

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Across
  1. 3. The process or skill of taking one number or amount away from another
  2. 6. all numbers between 10 and 99
  3. 7. the single symbols used to represent numbers in Maths
  4. 9. An arrangement of figures, one above the other
Down
  1. 1. the branch of mathematics that helps in the representation of problems or situations in the form of mathematical expressions
  2. 2. people use this for payments
  3. 3. all numbers less that are 9 or less
  4. 4. The action or process of adding something to something else
  5. 5. A mathematical statement that is made up of two expressions connected by an equal sign
  6. 8. An arrangement of numbers or objects from left to right