Adding Fractions and Mixed Numbers with Unlike Denominators

The video tutorial explains how to add fractions with unlike denominators using two examples. The first example involves simple fractions, demonstrating the process of finding a common denominator when one is a factor of the other. The second example deals with mixed numbers, showing how to find the least common multiple (LCM) when denominators are not factors of each other. The tutorial concludes with a brief mention of additional resources for further learning.

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

• Find a common denominator

• Add the numerators directly

• Subtract the smaller fraction from the larger one

• Multiply the fractions

In the example 3/8 + 1/4, what is the common denominator used?

• 16

• 4

• 12

• 8

How do you convert 1/4 to have the same denominator as 3/8?

• Multiply by 3/3

• Multiply by 4/4

• Multiply by 2/2

• Multiply by 8/8

What is the result of adding 3/8 and 2/8?

• 1/8

• 3/16

• 5/8

• 6/8

When adding mixed numbers, what is the first step if the denominators are not factors of each other?

• Add the whole numbers first

• Find the least common multiple (LCM)

• Convert to improper fractions

• Subtract the smaller fraction from the larger one

What is the least common multiple (LCM) of 6 and 9?

• 12

• 18

• 24

• 36

How do you convert 5/6 to have a denominator of 18?

• Multiply by 4/4

• Multiply by 3/3

• Multiply by 2/2

• Multiply by 6/6

What is the equivalent fraction of 2/9 with a denominator of 18?

• 10/18

• 8/18

• 6/18

• 4/18

What is the sum of 2 and 5/6 plus 1 and 2/9 in mixed number form?

• 3 and 17/18

• 4 and 1/18

• 3 and 19/18

• 4 and 2/18

Where can you find more resources on fractions?

• Khan Academy

• Math World

• Math is Fun

• Front Porch Math