Adding Fractions with Different Denominators

The video tutorial explains how to add fractions with different denominators by finding a common denominator. It provides three examples: adding 2/3 and 2/9, 4/7 and 1/3, and 18 and 26. Each example demonstrates finding the lowest common multiple of the denominators, adjusting the numerators accordingly, and then adding the fractions. The tutorial concludes with an interactive exercise where viewers are asked to identify mistakes in fraction addition.

What is the first step in adding fractions with different denominators?

• Add the numerators directly

• Multiply the fractions

• Find a common denominator

• Subtract the smaller fraction from the larger one

In the example of 2/3 and 2/9, what is the common denominator used?

• 9

• 3

• 12

• 6

For the fractions 4/7 and 1/3, what is the lowest common multiple of the denominators?

• 14

• 21

• 28

• 35

When adding 4/7 and 1/3, what is the resulting fraction after finding a common denominator?

• 7/21

• 12/21

• 19/21

• 15/21

In the example with 18/8 and 26/6, what is the common denominator used?

• 36

• 24

• 30

• 18