Exploring 4th Grade Math Concepts

This video tutorial introduces fourth graders to the concept of common denominators, emphasizing the importance of understanding vocabulary related to fractions. It includes a word problem about cutting cakes into equal pieces and explains how to find common denominators using multiples. The tutorial also provides practice problems for students to apply their knowledge.

What is the main focus of lesson 6.4?

• Common denominators

• Common numerators

• Common multiples

• Common factors

In the word problem, how are the two cakes initially cut?

• Both into halves

• One into halves and the other into thirds

• One into quarters and the other into thirds

• Both into thirds

What is a common denominator?

• A common numerator of two or more fractions

• A common factor of two or more numbers

• A common divisor of two or more numbers

• A common multiple of two or more denominators

Why is it useful to find a common denominator when comparing fractions?

• It makes the fractions larger

• It makes the fractions smaller

• It makes the fractions easier to compare

• It changes the fractions to whole numbers

What is the least common multiple of 5 and 2?

• 5

• 10

• 15

• 20

How do you convert 1/2 to a fraction with a denominator of 10?

• Divide both the numerator and denominator by 2

• Divide both the numerator and denominator by 5

• Multiply both the numerator and denominator by 5

• Multiply both the numerator and denominator by 2

What is the equivalent fraction of 3/4 with a denominator of 8?

• 9/8

• 6/8

• 12/8

• 3/8

In the visual representation, how many 12ths is 1/3 equal to?

• 5/12

• 2/12

• 4/12

• 3/12

What is the purpose of changing fractions to have a common denominator?

• To make them smaller

• To make them easier to add and subtract

• To make them larger

• To change them to whole numbers

When comparing 1/3 and 4/12, what should you do first?

• Change 1/3 to 12ths

• Change 4/12 to thirds

• Subtract the fractions

• Add the fractions