How to Add and Subtract Fractions #11

This video tutorial explains how to add and subtract fractions by finding a common denominator. It covers the process of converting fractions to have the same denominator using the lowest common multiple (LCM) and demonstrates this with examples. The tutorial also addresses improper fractions and mixed numbers, showing how to convert them for addition and subtraction. Key concepts include finding the LCM, adjusting numerators, and simplifying fractions.

What is the first step in adding or subtracting fractions?

• Multiply the fractions

• Find a common denominator

• Find a common numerator

• Convert to decimals

When adding 3/4 and 1/3, what is the lowest common multiple of the denominators?

• 15

• 12

• 9

• 6

After finding a common denominator, what should you do next when adding fractions?

• Multiply the numerators

• Add the numerators

• Subtract the numerators

• Add the denominators

In the subtraction example, what is the lowest common multiple of 3 and 5?

• 15

• 20

• 12

• 10

What is an improper fraction?

• A fraction where the numerator is larger than the denominator

• A fraction with a common denominator

• A fraction where the numerator is smaller than the denominator

• A fraction that cannot be simplified

How do you convert a mixed number to an improper fraction?

• Divide the numerator by the whole number

• Add the whole number to the numerator

• Multiply the whole number by the denominator and add the numerator

• Subtract the numerator from the denominator

In the example of adding 2 3/4 and 5/12, what is the improper fraction form of 2 3/4?

• 9/4

• 8/4

• 11/4

• 10/4