Mr Ong earns $1200 a month. He spent 1/2 of it on rent and 1/3 of the remainder on groceries. How much money did he have left?
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.