Decimal addition and subtraction

123456789101112
Across
  1. 1. 9.35-8.55
  2. 4. 9877232.6-7660001.1
  3. 5. 767732.5+332767.9
  4. 7. 4.35-3.75
  5. 9. 7.35+2.54
  6. 11. 9.54+7.73
  7. 12. 5.75-4.92
Down
  1. 2. 99.86+766.97
  2. 3. 777.89+968.22
  3. 6. 627399.8-327008.7
  4. 8. 7.98-4.77
  5. 10. 17.89+89.14