kisi kisi tugaz PBO

//NOTE PAD++ HAL.1
public class matematika
{
//metod
int hasil=0;

int penjumlahan(int n1,int n2)
{
hasil=n1+n2;
return hasil;
}

void pengurangan(int n1,int n2)
{
hasil=n1-n2;
System.out.println(hasil);
}
}
//NOTE PAD++ HAL.2

public class matematikaBeraksi
{
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
//kelas utama
public static void main(String[] args)
{
matematika mtk=new matematika();
System.out.println(mtk.penjumlahan(5,4));
mtk.pengurangan(10,6);
}
}
maaf zex akeh seng kurang.........................................