Finding the Error in Adding Fractions

The video tutorial emphasizes the importance of checking the reasonableness of answers when adding fractions. It demonstrates how to use benchmark fractions to verify the correctness of fractional addition equations. By comparing the sum to the add-ins, the video shows that the equation 1/5 + 3/4 = 5/8 is incorrect. The lesson concludes with a summary of using benchmark fractions for verification.

Why is it important to check the reasonableness of answers when adding fractions?

• To make sure the sum is a whole number

• To verify the sum is greater than both addends

• To ensure the sum is less than the addends

• To confirm the sum is equal to one of the addends

What is the purpose of using benchmark fractions?

• To convert fractions to decimals

• To simplify fractions

• To compare fractions to a common reference

• To find the exact sum of fractions

How does 5/8 compare to 1/5?

• 5/8 is less than 1/5

• 5/8 is equal to 1/5

• 5/8 is greater than 1/5

• 5/8 is not comparable to 1/5

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

• 4/8

• 7/8

• 6/8

• 5/8

Why is the equation 1/5 + 3/4 = 5/8 incorrect?

• Because 5/8 is equal to 1/5

• Because 5/8 is less than 3/4

• Because 5/8 is less than 1/5

• Because 5/8 is greater than 3/4