MATHEMATICS

123456789
Across
  1. 4. Add 3 + 3.
  2. 5. Add 1 + 1.
  3. 6. Number before 10.
  4. 7. Subtract 6 - 3.
  5. 8. Number before 5.
  6. 9. Number after 7.
Down
  1. 1. Number after 4.
  2. 2. Add 2 + 2.
  3. 3. Add 7 + 2.
  4. 7. Subtract 5 - 2.