( 1).28/ 1\5
=28x5
= 140 (piece)
Answer: The big gear has 140 teeth.
(2).80/( 1-4\5)
=80/ 1\5
=80x5
=400 (weeks)
The pinion rotates 400 times per minute.
1490000 = 9000000
90000000/( 1- 1\46)
= 900000000 x46 \ 45
=(90000000x46)\45
=92000000 (person)
92 million people = 92 million people
A: There are about 92 million people in Henan.
/is the division symbol; \ Represents a score.