###Human: A snake's head is one-tenth its length. If a snake is 10 feet long, calculate the length of the rest of its body minus the head., ### Assistant: A snake's head is one-tenth its length, which is 1/10*10 = 1 foot.
Since the snake's head is 1 foot, the rest of its body is 10-1 = 9 feet long. 
 So the answer is :  9