My equal(=), Ans and dot (.) button doesn't work. They show 0.
Some buttons on my calculator don't work. These are Ans, dot(.) and the equal (=) buttons. They all display zeros(0) when I press them. I can't even solve anything because the equal button doesn't work. It only shows zero. It's a Casio fx-991 es plus calculator.
Es esta una buena pregunta?