Java - Resolver Ejercicio Herencia

public class SCNUMEROS {

    protected double A;

    protected double B;

    public SCNUMEROS(double a,double b){

        this.A=a;

        this.B=b;

    }

    public double getA() {

        return A;

    }

    public double getB() {

        return B;

    }

}

public class OPERACIONES extends SCNUMEROS {

    public OPERACIONES(double a,double b){

        super(a,b);

    }

    public double getSUMA(){

        return super.getA()+super.getB();

    }

    public double getMULTIPLICACION(){

        return super.getA()*super.getB();

    }

    public double getDIVISION(){

        return super.getA()/super.getB();

    }

    public double getRESTA(){

        return super.getA()-super.getB();

    }

}

public class YESSENIA_HERENCIA {

    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        Scanner Leer=new Scanner(System.in);

        double NUM1,NUM2,S,D,M,R;

        System.out.println("Ingresar numero 1");

        NUM1=Leer.nextDouble();

        System.out.println("Ingresar numero 2");

        NUM2=Leer.nextDouble();

        OPERACIONES OP=new OPERACIONES(NUM1,NUM2);

        S=OP.getSUMA();

        R=OP.getRESTA();

        D=OP.getDIVISION();

        M=OP.getMULTIPLICACION();

        System.out.println("Suma="+S);

        System.out.println("Resta="+R);

        System.out.println("Multiplicacion="+M);

        System.out.println("Division="+D);

    }

}