Natural numbers

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1234567891011121314
Across
  1. 2. 'RESTA' in english
  2. 4. 10 x 10 = ... (two words)
  3. 7. We currently use this numeral system
  4. 9. How do you write 'POR' in english?
  5. 11. If a division is not exact, it is
  6. 12. a · (b + c) = a · b + a · c, is the.......................property
  7. 13. 'POTENCIA' in english
  8. 14. 7·7·7 is equal to........(two words)
Down
  1. 1. How do you write 'RESTO' (division) in english?
  2. 3. If you raise a power to another power you keep
  3. 5. a · b = b · a, is the ..................property
  4. 6. If you transform a number as a sum of powers of base 10, it is a polynomial.............
  5. 8. (a + b) + c = a + (b + c) is the ................property
  6. 9. same base and...........the exponents
  7. 10. 'SUMA' in english