def
cong(a, b):
return
a
+
b
def
tru(a, b):
return
a
-
b
def
nhan(a, b):
return
a
*
b
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myexample.py
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mymath.py
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import mymath
num1
=
1
num2
=
2
print
'Tong hai so la: '
, mymath.cong(num1, num2)
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