Multiplying and Simplifying Fractions

This video tutorial covers Go Math Module 4, Lesson 1, focusing on applying the greatest common factor (GCF) and least common multiple (LCM) to fraction operations. The lesson begins with an introduction to multiplying fractions, emphasizing the importance of multiplying numerators and denominators. It then explores the cross canceling method for simplifying fractions, followed by examples involving whole numbers and fractions. The tutorial concludes with a section on multiplying mixed numbers, demonstrating how to convert them into improper fractions for easier calculation.

What is the main focus of the lesson in Module 4, Lesson 1?

• Subtraction of fractions

• Division of fractions

• Multiplication of fractions

• Addition of fractions

When multiplying fractions, what do you do with the numerators?

• Add them

• Subtract them

• Multiply them

• Divide them

What is the purpose of simplifying a fraction after multiplication?

• To make it a whole number

• To make it easier to understand

• To make it a decimal

• To make it larger

What is the cross-canceling method used for?

• Finding the least common multiple

• Converting fractions to decimals

• Simplifying fractions before multiplication

• Adding fractions

In the cross-canceling method, which part of the fractions do you focus on?

• Diagonals

• Whole numbers

• Denominators only

• Numerators only

How do you convert a whole number to a fraction?

• Multiply by 2

• Put it over 1

• Add 1 to it

• Subtract 1 from it

In a word problem, if 5/9 of a class has pets, how do you find the number of students with pets?

• Divide the total number of students by 5/9

• Multiply 5/9 by the total number of students

• Subtract 5 from 9

• Add 5 to 9

What is the first step in multiplying mixed numbers?

• Divide the fractions

• Multiply the whole numbers

• Convert them to improper fractions

• Add the whole numbers

How do you simplify the result of multiplying mixed numbers?

• Cross-cancel common factors

• Convert to a decimal

• Add the numerators

• Subtract the denominators

What is the result of multiplying 2 and 3/8 by 16?

• 48

• 38

• 32

• 28