Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to add large numbers [title] Write any two or more multi-digit numbers in a vertical column. [step] This method is sometimes called " the traditional method. " it involves adding the numbers in units of single digits, then by units of tens, then by units of hundreds.

Ending1: This is accomplished by working from right to left. Start by adding the figures 383 + 412 + 122. Ending2: This is the only method you will use in this way. [substeps] The vertical column should be no more than 2 inches (5.1 cm) wide. Ending3: One column can range anywhere from ten to thirty units. [substeps] For example, an example of a nine-digit number would be eight. Ending4: Essentially, it's just like your regular column. In its simplest form, all you have to do is a single process called " converting.

Answer format: ending1/ending2/ending3/ending4