public void Add()
{
//Arrange
var num1a = 22.1115m;
var num1b = 0.0005m;
var expectedResponse1 = 22.112m;
var num2a = 14.0208m;
var num2b = 2.2113m;
var expectedResponse2 = 16.2321m;
var num3a = 51.2369m;
var num3b = 11.6528m;
var expectedResponse3 = 62.8897m;
var num4a = 21.6325m;
var num4b = -25.1985m;
var expectedResponse4 = -3.566m;
//Act
var response1 = Math.Round(MathFunctions.AddNumbers(num1a, num1b), 4);
var response2 = Math.Round(MathFunctions.AddNumbers(num2a, num2b), 4);
var response3 = Math.Round(MathFunctions.AddNumbers(num3a, num3b), 4);
var response4 = Math.Round(MathFunctions.AddNumbers(num4a, num4b), 4);
//Assert
Assert.AreEqual(expectedResponse1, response1);
Assert.AreEqual(expectedResponse2, response2);
Assert.AreEqual(expectedResponse3, response3);
Assert.AreEqual(expectedResponse4, response4);
}