Addition (easy)

12345678
Across
  1. 3. 700+80+9
  2. 5. 250000+750000
  3. 6. 462+483
  4. 7. 559+209
  5. 8. 790+30
Down
  1. 1. 189000+907+80
  2. 2. 48+52
  3. 4. 4980+90