1 / 19

Cool Maths.US

Cool Maths.US. Multiplying any 2 digit number by 11 Total Training Time – 3 minutes. What we will learn. Learn how to easily multiply any 2 digit number with 11 – in 2 seconds !. Find lots of cool stuff online !. Get more of Cool Maths stuff at www.CoolMaths.us. Question 1. Multiply

dalila
Download Presentation

Cool Maths.US

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cool Maths.US Multiplying any 2 digit number by 11 Total Training Time – 3 minutes

  2. What we will learn Learn how to easily multiply any 2 digit number with 11 – in 2 seconds !

  3. Find lots of cool stuff online ! Get more of Cool Maths stuff at www.CoolMaths.us

  4. Question 1 Multiply 34 by 11

  5. To Multiply 34 by 11 • Write 3 and 4 • Between 3 and 4, enter the sum of 3 and 43 + 4 = 7 • 3 7 4 • You get the answer 374

  6. The 5 Steps • 34 x 11 • 3+4 =7 • 374 • 374

  7. That was Coooooool! Wasn’t it ? www.CoolMaths.us

  8. Question 2 Multiply 87 by 11

  9. What’s Different • In the first Question, the sum of the digits was single digit number (3+4=7). • Now lets look at a question where the sum of the two digits is more than 9 (i.e. a 2 digit number).

  10. To Multiply 87 by 11 • Write 8 and 7 • Between 8 and 7, enter the sum of 8 and 78 + 7 = 15 • 8 15 7 • Carry over the tens from 15 to the digit on the left which in this case is 8 • You get the answer 9 5 7

  11. The 5 Steps • 87 x 11 • 8+7 =15 • 8157 • 8+157 • 957

  12. Practice 1

  13. Practice Solutions • Next screen has the answers to the practice questions. • Do you have your answers written down ? • How much time did it take you to do these answers ? • Share your timing and scores with other Cool Maths Champions on www.CoolMaths.us

  14. Practice Solutions 1

  15. Practice 2

  16. Practice Solutions • Next screen has the answers to the practice questions. • Do you have your answers written down ? • How much time did it take you to do these answers ? • Share your timing and scores with other Cool Maths Champions on www.CoolMaths.us

  17. Practice Solutions 2

  18. About this Technique • This technique of multiplying a 2 digit number comes from Vedic Mathematics – an ancient system of mathematics from the Vedas (Vedas are a large body of texts originating in Ancient India).

  19. We Make Maths = Fun + Cool www.CoolMaths.us

More Related