What is 9 multiplied by 9?

To understand why the answer is 81, it is important to recognize that multiplication is essentially repeated addition. The operation of multiplying 9 by 9 means you are adding the number 9 to itself a total of 9 times.

So, if you calculate it step-by-step, it looks like this:

9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 81.

This total is confirmed by knowing that 9 multiplied by 9 results in a larger number, specifically 81. This is a basic multiplication fact that can often be found on multiplication tables, reinforcing the idea that 9 times 9 will consistently yield 81.

Understanding fundamental multiplication tables helps not only solve this problem but also builds a foundation for more complex arithmetic operations. Exploring the other values, like 72, 90, and 88, shows that they do not maintain true to the multiplication of 9 by 9 and thus are not valid answers to the question asked.