#include <iostream>;
using namespace std;

/*baitap3*/

int main()
{
	double a,b,tong,hieu,tich;
	cout<"nhap vao so thuc thu nhat:";
	cin>>a;
	cout<<"nhap vao so thuc thu hai:";
	cin>>b;
	tong=a+b;
	hieu=a-b;
	tich=a*b;
	cout<<"tong la:"<<tong;
	cout<<"\nhieu la:"<<hieu;
	cout<<"\ntich la:"<<tich;
	return 0;
	
}
