Subtracting Fractions and Common Denominators

The video tutorial from Moomoomath and Science explains how to solve fraction subtraction problems with uncommon denominators. It begins with finding a common denominator using prime factorization, then demonstrates solving 2/3 minus 1/6 and 5/4 minus 1/3. The tutorial emphasizes the importance of common denominators and provides step-by-step instructions for solving these problems. The video concludes with a call to action to subscribe for more math and science content.

What is the first step in solving a fraction subtraction problem with uncommon denominators?

• Add the numerators directly.

• Find a common denominator.

• Subtract the denominators.

• Multiply the fractions.

What method is used to find the least common denominator in the video?

• Decimal conversion

• Prime factorization

• Graphical method

• Cross-multiplication

What is the least common denominator for the fractions 2/3 and 1/6?

• 9

• 12

• 6

• 3

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

After finding the common denominator, what is the next step in subtracting fractions?

• Add the fractions.

• Subtract the denominators.

• Multiply the numerators by the number of times the denominator fits into the common denominator.

• Divide the numerators by the common denominator.

Tags

CCSS.7.NS.A.1C

What is the result of subtracting 2/3 from 1/6?

• 1/3

• 2/3

• 1/2

• 1/6

What is the least common denominator for the fractions 5/4 and 1/3?

• 6

• 8

• 12

• 16

Tags

CCSS.4.OA.C.5

How many times does 4 fit into the common denominator 12?

• 2 times

• 3 times

• 4 times

• 5 times

Tags

CCSS.7.NS.A.1C

What is the result of subtracting 1/3 from 5/4?

• 11/12

• 9/12

• 5/12

• 7/12

Why can't the fraction 11/12 be reduced further?

• Because both numbers are even.

• Because 12 is a prime number.

• Because both numbers are odd.

• Because 11 is a prime number.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the final step after subtracting fractions with a common denominator?

• Divide the result by the common denominator.

• Multiply the result by 2.

• Check if the result can be reduced.

• Add the fractions again.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D