def Test_Addition():
    a=10
    b=20
    assert a + b == 30

def Test_Multiplication():
    num1 = 2.0
    num2 = 3.0
    assert  num1 * num2 == 6

def Test_Sub():
    x=99.9
    y=85.7
    assert x - y== 4.2

def Test_Div():
    x = 45
    y = 9
    assert x/y == 5
