Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to add fractions [title] Check the denominators (bottom numbers) of each fraction. [step] If they are the same number, then you're dealing with fractions that have the same denominator. If not, skip to the section down below.

Ending1: [title] When you're finished, double align the fraction, and begin working with the organization of the denominators. [step] Highlight numbers if they're the same size, then highlight them if they're small. Ending2: [title] Find the denominators for the fractions. [step] If the fractions are the same number, you can add them together or do the same calculation. Ending3: [title] Multiply the fractions by 10. [step] If fractions have the same denominator, simply multiply them by 10. Ending4: [title] Here are two example problems we'll work on in this section. [step] By the last step, you should understand how they were added together.

Answer format: ending1/ending2/ending3/ending4