Math lesson

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Across
  1. 2. The result of subtraction.
  2. 5. The result of addition.
  3. 7. The number zero on number line is called ------.
  4. 8. The ------- numbers starts with one.
  5. 9. The name of our school.
  6. 10. A geometric figure which has only tree sides.
Down
  1. 1. The result of multiplication.
  2. 2. The number which written in a.b is called -------.
  3. 3. The result of division.
  4. 4. The ----- numbers starts with zero.
  5. 6. The part or parts of whole thing is called --------.