A library has 1,800 books. 30% of the books are fiction and 45% are non-fiction. The rest are reference books. How many reference books are there?
Opening the drawing…
MathBrush is being tested with a few parent groups, and every solution on the site is open to them. If you were given a code, it goes in once and this device remembers it. 65 worked examples are free to everyone without one.