When I divide, for example, 5 by 6 instead of giving the whole number, it gives me a fraction 5/6? How to NOT receive fractions?

Press MODE Key.

Press F1 Softkey [FLAGS]

You should see system flags

Use the arrow key to move down to ‘105’. Your calculator probably will show ‘Exact mode on’.

Press F3 Softkey [CHK], it will change to ‘Approx. mode on’

Press F6 Softkey [OK]

Press [ENTER] to exit mode

Now your HP 50g calculator should be set.