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)