Respuesta :

Answer:

 380 books left.

Step-by-step explanation:

 Data Given:

  total number of books  = 400

  books to be taken away  =  20

 To Find:

  books left out  =  ?

 Solution:

   Answer is obtained simply by using basic arithmetic operation of                          Subtraction

     400 -  20 = 380

Q&A Education