Understanding Fractions and Visual Models

This video tutorial explains how to subtract fractions with unlike denominators by finding a common denominator. It covers the concept of the least common denominator, converting fractions to equivalent forms, and using a visual model to demonstrate the subtraction process. The tutorial concludes with a summary of the steps involved.

Why is it necessary to have a common denominator when subtracting fractions?

• To make the numerators equal

• To ensure the fractions are of the same size

• To simplify the fractions

• To convert fractions to decimals

What is the least common multiple of 3 and 4?

• 15

• 12

• 9

• 6

Which of the following is a method to find a common denominator?

• Multiplying the denominators

• Dividing the numerators

• Adding the numerators

• Subtracting the denominators

What is the equivalent fraction of two-thirds with a denominator of twelve?

• 4/12

• 6/12

• 8/12

• 10/12

After converting to a common denominator, what is the result of subtracting 1/4 from 2/3?

• 5/12

• 1/12

• 3/12

• 7/12

Why is the fraction 5/12 considered simplified?

• Because 5 and 12 have no common factors other than 1

• Because it is less than 1

• Because 5 is a prime number

• Because 12 is a multiple of 5

In the visual model, how many parts is each third divided into?

• 5 parts

• 2 parts

• 3 parts

• 4 parts

What does the visual model show about the fraction 2/3?

• It is equivalent to 10/12

• It is equivalent to 6/12

• It is equivalent to 12/12

• It is equivalent to 8/12

How many pieces are left after removing 3 pieces from 8 in the visual model?

• 2 pieces

• 4 pieces

• 5 pieces

• 3 pieces

What is the size of each piece in the final visual model?

• 1/6

• 1/8

• 1/10

• 1/12