Beijing Normal University Edition, Grade Five, Volume II, Mathematics, Page 72, 5 questions are as follows

5.

(1) How many books are there in the school library?

(2) Please complete the above statistics.

Reference answer:

(1)2400÷20%= 12000 (Ben)

(2) Fill in the first blank: 30% (process: 3600÷ 12000=0.3=30%)

Fill in the second blank: 6000 Process: 12000×50%=6000 (Ben)