What's 66 + 21
Understand the Problem
The question is asking for the sum of 66 and 21, which is a basic arithmetic operation.
Answer
The sum of 66 and 21 is $87$.
Answer for screen readers
The sum of 66 and 21 is $87$.
Steps to Solve
-
Identify the numbers to add The two numbers we need to add are 66 and 21.
-
Set up the addition We'll write the addition expression as follows:
$$ 66 + 21 $$
- Perform the addition Now, we calculate the sum of the two numbers:
$$ 66 + 21 = 87 $$
The sum of 66 and 21 is $87$.
More Information
Adding two numbers is one of the most basic mathematical operations. This type of problem helps build a strong foundation for more complex arithmetic.
Tips
- A common mistake is to misalign the numbers when doing column addition, which can lead to incorrect results. Ensure that the numbers are aligned correctly.
- Another mistake might be skipping the carry when adding digits, so always double-check each digit's sum.
AI-generated content may contain errors. Please verify critical information
Thank you for voting!
