Math crossword

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Across
  1. 1. in a power, the number used as a factor
  2. 6. indicates which equation is first to be solved
  3. 7. repeated subtraction
Down
  1. 2. in a power,the amount of times the base is used as a factor
  2. 3. removing an amount from a number
  3. 4. repeated addition
  4. 5. merging two or more numbers to make a sum
  5. 6. multiplying a number by itself repeatedly