funky maths

12345678
Across
  1. 2. is a decimal number
  2. 3. It is greater than 30
  3. 4. it is an integer
  4. 7. it has 3 zeros
  5. 8. it is a factor of 48
Down
  1. 1. it is a power of tens
  2. 3. 5+100
  3. 5. it is rounded to 500
  4. 6. 50+20
  5. 7. it is a multiple of 2