Borrow one ten from the top tens place digit and make the 3 into 13. The top tens place number becomes a 7 after borrowing one ten from it. Now subtract 9 from 13 to get the answer of 4. The 4 is placed below the line in the ones place column. Once again, rearrange and borrow one from the thousands place to make the top number larger than the bottom number.
Extra time is awarded for each correct answer.
Play longer by getting more correct. Copyright 2000 J.Banfill. All Rights Reserved.