Respuesta :

57.80 - 4.07

= 57.80 - 4.00 - 0.07

= 53.80 - 0.07

= 53.73
1st when you start to subtract decimals you line them up
so  57.8
     -4.07
    _______
Next you need to act like the decimal point is not there, then subtract then add the decimal point.
The answer would be....
53.73