Current location - Training Enrollment Network - Mathematics courses - Mathematical animals line up. The puppy ranks eighth in the front and ninth in the back. How many animals are there?
Mathematical animals line up. The puppy ranks eighth in the front and ninth in the back. How many animals are there?
The number of puppies ranked eighth in .......... in the past, with seven in front;

.........., nine in the back, and eight in the back.

* * * has: 7+ 1+8= 16.