# How to easily multiply any number by twelve | Summary and Q&A

72.5K views
April 30, 2014
by
tecmath
How to easily multiply any number by twelve

## TL;DR

Learn how to quickly multiply any number by 12 using a simple doubling and neighbor addition method.

## Key Insights

• 🎁 The video presents a quick and efficient method for multiplying any number by 12.
• 🪡 The doubling and neighbor addition technique simplifies the multiplication process and reduces the need for complex calculations.
• #️⃣ It is important to include zeros and carry numbers when using this method to ensure accurate results.
• #️⃣ The method can be used for larger numbers as well, but it may require carrying numbers over multiple calculations.
• ⌛ This multiplication trick is similar to the 11 times table trick and can be a valuable tool in mastering mental math skills.
• 🐎 Practice and familiarity with the method will enhance speed and accuracy in multiplying by 12.
• ⌚ The video suggests watching other similar tricks for different numbers, such as the 11 times table trick.

## Transcript

good day welcome to the tech math Channel what we're going to be having a look at in this video is a way of multiplying by the number 12 fairly quickly so let's get straight into it okay so say you were asked to multiply the following number by 12 314 * 12 now the way that we do this is we're going to follow two simple rules and these are as follow... Read More

### Q: How does the method for multiplying by 12 work?

The method involves doubling each digit and adding the neighbor to the right. This allows for fast multiplication without complex calculations.

### Q: What happens when there is a carry number in the calculation?

When a carry number occurs, it is added to the next calculation. For example, if doubling a digit results in a number greater than 9, the extra digit is carried over to the next calculation.

### Q: Can this method be used for multiplying by numbers other than 12?

Yes, the doubling and neighbor addition method can be applied to other numbers as well. However, the specific steps will vary depending on the multiplier.

### Q: Are there any limitations to this multiplication trick?

This trick works effectively for multiplying by 12, but it may not be as efficient for other numbers. It is recommended to practice and understand the method for each specific multiplier.

## Summary & Key Takeaways

• This video teaches a method to multiply any number by 12 quickly by doubling each digit and adding the neighbor to the right.

• The method is demonstrated with two examples, showing how to multiply smaller and larger numbers by 12.

• It is emphasized to remember to include zeros and carry numbers across when using this method.