Addition is usually the first of the four basic mathematical functions learned. Any problem asking the student for a sum or total requires the use of addition. You are probably familiar with addition problems that are given in column form, as in Example 1. Calculate the sum for each problem in Example 1. Addition is one of the functions used when calculating insulation needs in the home.
Insulation refers to a material with the ability to store heat.
A material's ability to resist heat flow is measured by its R-value. The higher the R-value the higher the insulating value of the material. When constructing the walls of a home, several layers of materials are used. Read the following problem. Derive and solve the indicated mathematical formula.