tony cut 2 ft 7 1/2 in. length from 8 in long board. what is the remaining length of the board.
5 answers

Something is wrong with you units. You can't cut more than 2 feet from an 8 inch board.

sorry meant 8ft

8 ft = 7 feet, 12 inches
7 ft, 12 in  2 ft, 7 1/2 in = 5 ft, 4 1/2 in


Okay.. good.
You could change everything to inches to do the work.
8 foot board = 96 inches
2 foot 7 1/2 inches = 31 1/2 inches
Now you can subtract: be careful with the fractions.
If you think of 96 as 95 + 1
which is the same as 95 + 2/2
You can subtract 31 from 95 and 1/2 from 2/2
This gives your answer in inches. To change it back to feet divide by 12.

Thank you guys this really helps