Chapter 10
Decimals
Decimals are commonly used for money, as well as for weights and measures, especially when using the metric system. Generally speaking, decimals are easier to work with than fractions, provided that you know how to place the decimal point in your answer.
The Problems You’ll Work On
In this chapter, you work on the following types of skills:
Knowing how to change the most common decimals to fractions, and vice versa
Calculating to convert between decimals and fractions
Understanding repeating decimals and converting them to fractions
Applying the Big Four operations (adding, subtracting, multiplying, and dividing) to decimals
What to Watch Out For
Here are a few tips for working with decimals:
To change a decimal to a fraction, put the decimal in the numerator of a fraction with a denominator of 1. Then, continue to multiply both the numerator and denominator by 10 until the numerator is a whole number. If necessary, reduce the fraction. For example, change 0.62 ...
