Key math skills

The chapter section containing each Key Math Skill is shown in parentheses at the end of each heading. 

Example Identify the place values for each of the digits in the number 456.78. 

Example A drawer contains 6 white socks and 18 black socks. What is the percent of white socks  

An equation in chemistry often contains an unknown. To rearrange an equation to obtain the unknown factor by itself, you keep it balanced by performing matching mathematical operations on both sides of the equation. 

Example Solve the equation for a 3a Answer Add 8 to both sides 3a - 8 

A graph represents the relationship between two variables. These quantities are plotted along two perpendicular axes, which are the X axis (horizontal) and y axis (vertical). The title indicates the components of the X and y axes. Numbers on the x and y axes show the range of values of the variables. The graph shows the relationship between the component on the y axis and that on the x axis. 

---

During your study of chemistry, you will work many problems that involve numbers. You will need various math skills and operations. We will review some of the key math skills that are particularly important for chemistry. As we move through the chapters, we will also reference the key math skills as they apply. 

This Key Math Skill from the previous chapter is listed here for your review as you proceed to the new material in this chapter. 

These Key Math Skills and the Core Chemistry Skills from previous chapters are listed here fa- your review as you proceed to the... 

---