Addition under 100

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Across
  1. 4. 16+46
  2. 7. 80 + 18
  3. 8. 4 lots of 10
  4. 10. 43+44
Down
  1. 1. 3 lots of 21
  2. 2. half of 72
  3. 3. half of 50
  4. 5. half of 24
  5. 6. Double 45
  6. 9. 59 + 12