Adding fractions with unlike denominators | 2/5 + 2/3

The video tutorial explains how to add fractions with unlike denominators. It begins by highlighting the problem of directly adding fractions with different denominators and emphasizes the need for a common denominator. The instructor demonstrates how to find common denominators by listing multiples and then calculating equivalent fractions. The process concludes with adding the fractions and leaving the result as an improper fraction, reinforcing the importance of finding common denominators.

Why can't you simply add fractions with different denominators directly?

• Because the numerators are different.

• Because the denominators are not the same.

• Because fractions are always improper.

• Because the fractions are not in simplest form.

What is the first step in finding a common denominator for two fractions?

• Add the numerators.

• List the multiples of each denominator.

• Subtract the smaller denominator from the larger one.

• Multiply the denominators.

What is the least common multiple of 5 and 3?

• 20

• 25

• 15

• 10

How do you adjust a fraction to have a new denominator?

• Divide the numerator by the denominator.

• Multiply both the numerator and denominator by the same number.

• Add the same number to both the numerator and denominator.

• Subtract the numerator from the denominator.

What is the result of adding 6/15 and 10/15?

• 1/15

• 26/15

• 15/16

• 16/15