math
posted by Anonymous .
The carpenter bought a 16 foot board. He cut off three pieces: 3 feet 4 inches, 2 feet 10 inches, and 6 feet 8 inches. How much board does he have left?

3'4" + 2"10" + 6'8" = 11'22" = 12'10"
16" = 15'12", so the amount left is
15'12"  12'10" = 3'2" 
1 ft = 12 in
2 ft = 24 in
6 ft = 72 in
16 ft = 192 in
3 ft + 4 in + 2 ft + 10 in + 6 ft 8 in =
36 + 4 + 24 + 10 + 72 + 8 = 154 in
16 ft  154 in = 192 in  154 in =
38 in =
36 in + 2 in =
3 ft 2 in 
if 3 1/2 inches are cut off one end of an 8foot length of lumber, what length remains