The printer prints one page in 10 seconds. How many pages can this printer print in 5 minutes?

Let’s solve this task by actions with explanations.
1) 1: 10 = 1/10 of a page, the printer will print in one second, since it prints one page in 10 seconds;
2) 5 * 60 = 300 seconds in five minutes, since one minute has 60 seconds;
3) 1/10 * 300 = (1 * 300) / 10 = (1 * 30) / 1 = 30/1 = 30 pages can be printed on this printer in 5 minutes, since in a second it can print 1/10 parts of pages.
Answer: 30 pages.