When adding numbers, make sure to write the numbers one below the other, lining up the digits by place value (ones under ones, tens under tens). Start adding from the right (the ones place) and move left. If a sum is 10 or more, carry over the extra to the next column.

Subtracting means finding out how much is left when you take away part of something. Start with the bigger number on top. Make sure to line up the numbers by place value (ones, tens, hundreds, etc.). Start subtracting from the right (the ones place) and move left.

Subtract the smaller number from the bigger number. Make sure to line up the numbers by place value (ones, tens, hundreds, etc.).

To calculate the difference in points between the teams, subtract the points of the second team from the points of the first team.