According to the different conditions given, the formulas are listed separately, not counting. There are 400 books on literature and art in the library. How many books on science and technology are th
According to the different conditions given, the formulas are listed separately, not counting. There are 400 books on literature and art in the library. How many books on science and technology are there? (1) literature books
( 1)400÷45;
(2)400×( 1+ 15);
(3)400×58;
(4)(400+84)÷ 1 120.
Therefore, the answer is: 400 ÷ 45; 400×( 1+ 15); 400×58; (400+84)÷ 1 120.