Adding and Subtracting Fractions

This video tutorial covers the process of adding and subtracting fractions, emphasizing the importance of finding a common denominator. It explains the rules for these operations and provides examples to illustrate the concepts. The video also demonstrates how to verify results using a graphing calculator and discusses the conversion of mixed numbers to improper fractions for easier calculations.

What is the first step in adding or subtracting fractions?

• Multiply the fractions

• Divide the fractions

• Find a common denominator

• Find a common numerator

Why can't you simply add the numerators and denominators of fractions directly?

• It results in a larger fraction

• It results in an incorrect fraction

• It results in a negative fraction

• It results in a smaller fraction

What is the least common multiple (LCM) of 8 and 6?

• 12

• 18

• 24

• 30

In the example of subtracting fractions, what is the least common denominator of 12 and 18?

• 36

• 30

• 42

• 24

How can you verify the result of a fraction subtraction using a graphing calculator?

• By converting the result to a fraction

• By multiplying the result by 2

• By dividing the result by 2

• By converting the result to a decimal

What is one method to add mixed numbers?

• Subtract the whole numbers

• Convert them to improper fractions

• Convert them to decimals

• Multiply the whole numbers

When converting a mixed number to an improper fraction, what operation is performed?

• Add the whole number to the fraction

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

• Subtract the numerator from the whole number

• Divide the whole number by the numerator

What is the least common denominator of 3 and 5?

• 20

• 15

• 10

• 12

If you have a fraction 14/3, what is the mixed number form?

• 4 and 2/3

• 5 and 2/3

• 5 and 1/3

• 4 and 1/3

What is the result of adding 70/15 and 57/15?

• 127/15

• 127/30

• 127/45

• 127/60