Place one number above the other so the tens place digits and ones place digits are lined up. Draw a line under the bottom number. Subtract the two digits in the ones places. If the digit that is being subtracted in the ones place is more than the top ones place digit, decrease the top tens place digit by one and increase the top ones place digit by ten before subtracting.
Extra time is awarded for each correct answer.
Play longer by getting more correct. Copyright 2000 J.Banfill. All Rights Reserved.