maths easy

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Across
  1. 1. -5+5
  2. 4. 5 times 11
  3. 7. 1+1+2+3+4+99
  4. 8. 29+55
  5. 9. what does this symbol mean <
Down
  1. 2. 12 times 12
  2. 3. 4 times 8
  3. 5. 7 times 7
  4. 6. what does this symbol mean +