addition subtraction

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Across
  1. 3. you are taking maths test.You are running out of time.How can you quickly answer.65789-10000
  2. 5. 35686-1
Down
  1. 1. 4284+1
  2. 2. my fatherbought a TV for Rs 25000 a refrigerator for Rs 1425.Total cost my father paid is _________
  3. 3. than 56385
  4. 4. in my school library 72100 books are there.On the student's request 8900 books were bought.Total number of books in my school library now is ____________