<PRE><B>Question 963962</B>
  1yd 2ft 10in MINUS 3ft 8in



1*yard_________2*feet________10*inch
MINUS
0*yard________3*feet_________8*inch



Clearly the 1 yard is larger than the 0 yards.  The subtraction can be done.   You understand unit conversions and borrowing?   The 2 feet must borrow the 1 yard as 3 feet.  The 10 inch does not need to borrow anything.</PRE>