Easy Multiplication Trick you will Actually Use

TL;DR

Learn how to solve multiplication questions quickly in your head using a simple trick.

Transcript

can you solve this easy multiplication question in your head 14 * 17 you better to answer this pretty much instantly but I'm going to give you 3 seconds go so time's up did you get the following answer of 238 if you did congratulations if not keep watching because I'm going to show you right now how to easily and instantly solve these types of ques... Read More

Key Insights

• ✖️ Mental math tricks can help solve multiplication questions quickly and easily.
• 🎮 The trick explained in the video involves adding, multiplying, and mentally manipulating numbers.
• 🦻 Understanding how numbers relate to 10 can aid in using the mental trick effectively.
• 🐎 Practicing mental math techniques can improve mental calculation speed and efficiency.
• ✖️ The trick can be applied to a variety of multiplication questions with different digit combinations.
• 🎮 The video provides step-by-step instructions and practice questions to reinforce the mental multiplication trick.
• 🤗 This mental multiplication trick is a useful tool for situations where a calculator or pen and paper are not readily available.

Questions & Answers

Q: How does the mental multiplication trick for multiplying by 17 work?

The trick involves adding one of the unit numbers to the tens digit, multiplying by 10, and then multiplying the unit numbers together and adding it to the previous result. For example, for 14 * 17, we add 14 + 7 to get 21, multiply by 10 to get 210, and then add 4 * 7 (28) to get the final answer of 238.

Q: Can you explain the steps for multiplying 13 * 16 using the mental trick?

To multiply 13 * 16, we add 13 + 6 to get 19, multiply by 10 to get 190, and then add 3 * 6 (18) to get the final answer of 208.

Q: How do we apply the mental trick to multiply 21 * 14?

For 21 * 14, we first determine how far each number is from 10. Since 21 is 11 more than 10, we use 11 as the number to work with. We add 11 + 14 to get 25, multiply by 10 to get 250, and then add 11 * 4 (44) to get the final answer of 294.

Q: Are there any additional tips for using this mental multiplication trick?

One helpful tip is to focus on how far each number is from 10 to determine the numbers to work with. Practicing with different numbers and applying the trick repeatedly can also improve mental calculation speed.

Summary & Key Takeaways

• The video teaches a mental math trick for multiplying two-digit numbers by 17, with examples and step-by-step instructions.

• The trick involves adding one of the unit numbers to the tens digit, multiplying the sum by 10, and then multiplying the unit numbers together and adding it to the previous result.

• The video provides three practice questions for viewers to try out the trick.