how do you show the group of digits the repeat in a repeating decimal

Question

by underlining them
by putting them in italics by putting a bar over them

Answer 1

To show the group of digits that repeat in a repeating decimal, you can use different formatting methods:

1. Underlining: You can underline the repeating digits. For example, in the repeating decimal \(0.3\underline{3}\), the underlined "3" indicates that this digit repeats.

2. Italics: You can put the repeating digits in italics. For example, in the repeating decimal \(0.3\textit{3}\), the italicized "3" shows that it is the repeating part.

3. Using a bar (vinculum): You can place a horizontal bar over the repeating digits. For example, in \(0.3\overline{3}\), the bar over the "3" indicates that this digit repeats indefinitely.

Each of these methods effectively conveys the same information regarding which digits are repeating in the decimal representation.