Adding and Subtracting Fractions

The video tutorial covers the addition and subtraction of fractions, focusing on unlike fractions with different denominators. It explains how to find the least common multiple (LCM) to make denominators the same, allowing for straightforward addition or subtraction. The tutorial includes various problems, including mixed fractions, and emphasizes the importance of these concepts for exams.

What is the main goal when dealing with unlike fractions?

• To make the numerators the same

• To convert them into decimals

• To make the denominators the same

• To multiply them directly

What is the LCM of 3 and 7 used in the first problem?

• 35

• 28

• 21

• 14

In the second problem, what is the LCM of 10 and 15?

• 25

• 35

• 20

• 30

What is the result of adding 3/10 and 7/15 after converting to like fractions?

• 19/30

• 21/30

• 25/30

• 23/30

What is the LCM of 9 and 7 used in the third problem?

• 54

• 56

• 63

• 72

What is the sum of 4/9 and 2/7 after converting to like fractions?

• 44/63

• 50/63

• 46/63

• 48/63

In the fourth problem, what is the LCM of 5 and 6?

• 35

• 20

• 25

• 30

What is the result of adding 2/5 and 1/6 after converting to like fractions?

• 18/30

• 16/30

• 17/30

• 15/30

What is the LCM of 5 and 3 used in the fifth problem?

• 10

• 18

• 12

• 15

What is the sum of 4/5 and 2/3 after converting to like fractions?

• 20/15

• 21/15

• 22/15

• 23/15