Times table Trick (Elevens) - Fast Mental Multiplication Math Trick | Summary and Q&A

TL;DR

Learn how to quickly multiply any two-digit number by 11 using a simple trick that involves adding the digits together.

Key Insights

• ✖️ Multiplying two-digit numbers by 11 can be done instantly using a simple trick.
• 🪜 The trick involves writing the two digits and adding them together to get the answer.
• 🗨️ If the sum of the digits is greater than 10, carry the tens digit over to the left.
• 👻 This trick can be applied to larger numbers as well, allowing for quick mental calculations.
• ⌛ Mastering the 11 times table can make multiplication tasks much easier and more efficient.
• 🛟 The trick can be used for both classroom and real-life scenarios, saving time and effort.
• 🆘 Understanding the underlying principles of the trick helps develop mental math skills.

Transcript

get day and welcome to the tech math channel the question in this video is how fast can you times by 11s how fast can you times any two-digit number by 11s because it's something you should be able to do instantly and I'm going to show you how right now okay so what about if we had a question like 63 * 11 how would you get an instant answer to that... Read More

Questions & Answers

Q: How can I quickly multiply two-digit numbers by 11?

To multiply a two-digit number by 11, write the first digit, leave a space, write the second digit, and add them together to get the answer.

Q: What should I do if the sum of the digits is greater than 10?

If the sum of the digits is greater than 10, carry the tens digit over to the left and write the units digit.

Q: Can this trick be used for larger numbers as well?

Yes, this trick can be used for larger numbers. By following the same method, you can multiply any number by 11 in your head.

Q: How can I quickly multiply 7,622 by 11?

Write down the first digit (7), add the two digits together (7+6=13), and write down the units digit (3). Carry over the tens digit (1) and write it to the left of the first digit. The answer is 83,842.

Summary & Key Takeaways

• By following a specific method, you can instantly multiply two-digit numbers by 11.

• Write the first digit, leave a space, write the second digit, and then add them together to get the answer.

• If the sum of the digits is greater than 10, carry the tens digit over to the left and write the units digit.