import math
a =10
b =20
def Tong (a, b):
	cong = a +b
	print "Tong", cong
def Hieu(a,b):
	hieu = a - b
	print "Hieu", hieu
def Nhan (a,b):
	nhan = a * b
	print ("Nhan", nhan)
def Chia (a,b):
	Chia = a / b
	print ("Chia", Chia)
def  Du(a,b):
	Du = a % b
	print ("Du", Du)
def Luythua (a,b):
	LuyThua = pow(a,b)
	print ("Luy thua", LuyThua)

Tong (a ,b)
Hieu (a, b)
Nhan (a, b)
Chia (a, b)
Du (a, b)
Luythua (a, b)

