Cross Simplifying Fractions Explained

This video tutorial covers the concept of cross simplifying fractions to make multiplication easier. It begins with an introduction to the method, explaining how it helps simplify fractions early in the process. The tutorial provides a detailed step-by-step guide on how to identify common factors and perform cross simplification. Several examples are given, ranging from basic to advanced, allowing students to practice and understand the technique thoroughly. The video emphasizes the importance of simplifying fractions before multiplying to handle smaller numbers and avoid complex calculations.

What is the main advantage of cross simplifying when multiplying fractions?

• It saves time by simplifying smaller numbers early.

• It makes the problem more complex.

• It makes the numbers larger.

• It eliminates the need for multiplication.

Tags

CCSS.5.NF.B.6

When cross simplifying, what should you look for between the numerator and denominator?

• A common multiple to multiply both by.

• A common factor to divide both by.

• The smallest number possible.

• The largest number possible.

In the first example, what common factor is used to simplify 2 and 8?

• 8

• 1

• 2

• 4

After simplifying 2 and 8, what are the new values of the numerator and denominator?

• 1 and 4

• 2 and 4

• 1 and 8

• 2 and 8

In the second example, what common factor is used to simplify 5 and 15?

• 15

• 5

• 1

• 3

What should you do if the problem becomes complicated and hard to see?

• Skip the problem.

• Guess the answer.

• Rewrite a clean version of the problem.

• Give up and move on.

Tags

CCSS.1.OA.A.1

What is the simplified result of multiplying 1/3 by 1/2?

• 1/3

• 1/2

• 1/4

• 1/6

Tags

CCSS.4.NF.B.4A

CCSS.4.NF.B.4B

What should you always check at the end of a problem?

• If you can add more.

• If you can subtract more.

• If you can simplify again.

• If you can multiply more.

Tags

CCSS.6.EE.A.1

In the advanced example, what common factor is used to simplify 49 and 35?

• 5

• 7

• 2

• 10

What is the final simplified answer of the advanced example problem?

• 1/2

• 3/4

• 1/4

• 2/7

Tags

CCSS.7.NS.A.1C