5 hands-on exercises and 5 find-the-bug challenges for the JavaScript Math Rounding lesson. Every one is checked automatically in the browser — write the code, run it, and the tests tell you what still fails.
Report four point five rounded.
Report four point nine rounded down.
Report four point one rounded up.
Work out how many pages hold 23 items at ten per page.
Round pi to two decimal places as a number.
Rounding down loses the last partial page.
floor goes further down on a negative; trunc just cuts.
Ready to write the code?
The editor, the automatic checks and the worked solutions open up with an account.
Open the workspaceMultiply before rounding, then divide back.
Whole units should round down, not up.
toFixed returns a string, so the arithmetic joins instead.