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Understanding decimal addition is foundational in various mathematics applications, particularly in fields such as chemistry where precise measurements are crucial. To add decimal numbers, we align them by the decimal point, so that the tenths, hundredths, thousandths (and so on) are positioned in the same column. Taking our example of adding 6.078 g to 0.3329 g, we carefully write one number below the other, making sure the decimal points are lined up:

6.078
+0.3329
---------

Starting from the rightmost digit, we then add each column as we would with whole numbers, remembering to carry over if the sum exceeds 9 in a given column. This method ensures that each digit is in its correct place value, giving us an accurate and precise sum of the two numbers. After completing the addition, our result is 6.4109 g. This process is essential not only in mathematical problems but also when dealing with financial transactions, measurements in scientific experiments, and anywhere accurate quantitative analysis is needed.

In the context of chemistry, significant figures are a way of expressing precision in measurements. They are the digits in a number that carry meaning towards its precision. This includes all non-zero digits, any zeros between significant digits, and any trailing zeros in the decimal portion of a number.

For instance, in the sum of 6.078 g and 0.3329 g, 6.078 has four significant figures and 0.3329 has five. When these numbers are the result of measurements, the significant figures have critical implications. In calculations, the number of significant figures in the final answer should reflect the least precise measurement used in the calculation. However, in our addition example, we typically maintain more figures through interim calculations to avoid rounding errors and then round off the final result to reflect the precision of the original measurements. Understanding significant figures is vital for accurately reporting and interpreting experimental data in chemistry.

Chemical mathematics, often referred to as 'chem math', is the application of mathematical operations and principles to chemical problems and formulas. In chemical labs, calculations involving decimal addition are frequent, usually when measuring quantities like mass, volume, concentration, and other properties crucial for various reactions and experiments.

To properly apply chemical mathematics, a thorough understanding of units of measurement, conversions, moles, molarity, and stoichiometry is required. Additionally, an awareness of how to maintain significant figures and correctly round numbers is helpful in delivering precise and accurate results. In our given example, adding two masses measured in grams required decimal addition with an appreciation for significant figures, embodying the practical use of chem math in a real-world situation.