Operations with Fractions and LCM

This video tutorial covers the basics of adding and subtracting fractions. It explains the importance of having a common denominator and demonstrates how to find the least common multiple for fractions with different denominators. The tutorial includes examples of both simple and complex fraction problems, emphasizing the need to simplify final answers.

What must be true about the denominators of fractions before you can add or subtract them?

• They must be even numbers.

• They must be the same.

• They must be different.

• They must be prime numbers.

Tags

CCSS.4.NF.B.3A

What is the result of adding 1/2 and 1/2?

• 2

• 1

• 1/4

• 2/2

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the simplified form of 3/6 - 5/6?

• 1/6

• 2/6

• Negative 1/3

• Negative 2/6

What is the least common multiple (LCM) of 2 and 4?

• 6

• 4

• 8

• 2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of adding 2/9 and 1/3 after finding a common denominator?

• 5/9

• 4/9

• 3/9

• 6/9

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the simplified form of 1/4 + 2/16?

• 6/16

• 4/16

• 3/8

• 1/2

What is the least common multiple (LCM) of 3 and 5?

• 25

• 20

• 15

• 10

Tags

CCSS.7.NS.A.1C

What is the result of subtracting 3/6 and 5/4 after finding a common denominator?

• Negative 15/12

• Negative 9/12

• Negative 3/4

• Negative 3/6

Tags

CCSS.7.NS.A.1C

What is the simplified form of 1/2 - 8/7?

• Negative 16/14

• Negative 1/14

• Negative 9/14

• Negative 7/14

Tags

CCSS.7.NS.A.1C

What is the result of subtracting 5/8 and 7/5 after finding a common denominator?

• Negative 31/40

• Negative 25/40

• Negative 56/40

• Negative 7/40

Tags

CCSS.7.NS.A.1C