I think this should be 'multiplication times tables', rather than 'timetables'. 'Timetables' tell you what happens when, whereas 'times tables' are what are used for teaching arithmetic to children. They look like this: 1 x 2 = 2 2 x 2 = 4 3 x 2 = 6 ... and so on. Is arithmetic taught the same way in the Russian Federation?

They're called "times tables", so students can remember multiplication for lower numbers. Here's one example: http://nicholasacademy.com/multiplicationtable.gif

It's "the multiplication table" OR "the 'times' table" In the U.S. recently, the trend in elementary school is to call it "the multiplication facts" It's called a "table" because it's arranged in rows and columns, and you can look up an answer in it. It's sometimes called a "times table" because multiplication is often expressed by the word "times." 3 x 2 = 6 would be read aloud as "three times two equals six," and the word "times" is reasonable because the 3 x 2 is equivalent to "2 + 2 + 2," 2 added three times. See https://en.wikipedia.org/wiki/Multiplication_table

I use a "timetable," one word, no space, to find out when the train to Boston stops at the station in my town.