Same tens digit? Instantly multiply them

TL;DR

Learn a simple multiplication trick for multiplying two-digit numbers with the same tens value.

Transcript

good day can you solve this easy multiplication question in under 5 Seconds 43 multiplied by 46 as I said you have 5 Seconds go for it all right I already that's just about 5 Seconds did you get the following answer 1,978 if you did well done that is the correct answer if not keep watching CU I'm going to show you right now how you can easily and p... Read More

Key Insights

• 👂 The trick showcased in the video is a quick and efficient method for multiplying two-digit numbers with the same tens value.
• 👂 By finding the shared tens value and the differences between each number and this value, the trick simplifies the multiplication process.
• 😵 The trick involves using cross addition to determine the first part of the answer and multiplying the units digits before adding it to the first part.
• 👂 This trick can be extended to handle two-digit numbers without the same tens value by adapting the calculations.

Questions & Answers

Q: What is the trick for multiplying two-digit numbers with the same tens value quickly?

The trick involves finding the difference of each number from the shared tens value, using cross addition to determine the first part of the answer, and multiplying the units digits before adding it to the first part.

Q: How does the trick handle two-digit numbers without the same tens value?

If the two-digit numbers don't have the same tens value, the trick adapts by finding the shared tens value between the numbers and adjusting the difference calculation accordingly.

Q: Can you provide an example using the trick for multiplication?

Sure. Let's take the example of 31 multiplied by 34. The shared tens value is 30, and the difference between 31 and 30 is 1, while the difference between 34 and 30 is 4. Adding 1 and 4 gives us 5, which is the first part of the answer. Multiplying 1 and 4 gives us 4, which we add to the first part to get the final answer of 154.

Q: Are there other multiplication tricks similar to this one?

Yes, there are many other multiplication tricks that can be used for different scenarios. You can explore more of these tricks on the T from that channel mentioned in the video.

Summary & Key Takeaways

• The video teaches a quick and efficient method for multiplying two-digit numbers with the same tens value.

• The trick involves finding the difference of each number from the shared tens value and using cross addition to determine the first part of the answer.

• The remaining step is to multiply the units digits and add it to the first part to get the final answer.