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October 12, 2013

Addition Shortcuts (Mental Maths)

45 comments

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In this post, we will show you how to do Additions Mentally. Have a look at the Following Examples........
  • 342 + 557 + 629 + 746 + 825 = ?
    • When we are adding three-digit numbers, first add-two-digits at a time (Units and Tens Place).
    • 42 + 57 + 29 +| 46 + 25 = 199
    • To add 42 and 57, mentally treat 57 as 50 + 7 ( Because 50 would facilitate quick addition)
    • So, 42 + 57 = (42 + 50) + 7 = 92 + 7 = 99
    • Similarly, 99 + 29 = (99 + 20_ + 9 = 128
    • 128 + 46 = (128 + 40) + 6 = 174
    • 174 + 25 = (174 + 20) + 5 = 199
    • The last two digits (the units place and the tens place) of the addition are 99, while the digit 1 is to be carried forward).
    • Now Add,
      • 1 (Carried) + 3 + 5 + 6 + 7 + 8 = 30
    • So, the answer of the above addition is 3099 (initially, it may look lil confusing. Just practice this method and you can find how efficient this method is :)
  • The same logic can be extended to 4 digit additions too... have a look
  • 6965 + 3246 + 1234 + 9847 + 8238 = ?
    • Have a look at the solution below... (Click on the image to get a better view)                                 



  • 1598 + 5423 + 4627 + 7953 + 8675 = ?
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45 comments:

  1. :) nice mam !! plz provide content for short cut techniques req in statements and assumptions and similar ques asked in high level reasoning ?

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  2. yes mam ..please do the needful for the assumptions like questions ....looking forward ....very in need indeed ...

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  3. this website is really doing a worth job...really

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  4. SIR,
    WHAT UR TELLING FOR US IS VERY VERY VERY USEFUL THANK U VERY MUCH SIR...

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  5. thank u sir, its really helpful...

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  6. THS IS REALLY HELPFUL FOR US

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  7. this site is doing really a great work..

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  8. superb trick.....thq very much...

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  9. sir/madam it is good we need more tricks to improve ourselves according to new update thank you lot.

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  10. Daer Sir/Mam
    Plz provide the mothly magazine in the begning of the every month.

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  11. very good site....really helpful

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  12. very good site...really helpfulll

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  13. you guys are doing a great job hats off to you

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  14. I think above trick for addition is time consuming.....the better way is first add all thousand digits and then hundreds place digits and lastly add 10s place digits and units place..for example 1598+5423+4627+7953+8675
    1000+5000+4000+7000+8000=25000 then 500+400+600+900+600=3000 and 90+20+20+50+70=250 and
    8+3+7+3+5=26 then add all 25000+3000+250+26=28276

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    Replies
    1. COOL this is also nice method

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    2. This is so interesting , nice idea

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  15. I love this site......

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  16. this is very easy when compared to previous one

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  17. this method is very easy when compared to previous one

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  18. Thank You. U PPL R doing gr8 job

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  19. mam.. ths website is really grt. thank you.
    how do we do if its 5 digits?.

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  20. Sir
    a very nice techniques and very easy

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  21. Sir

    a very nice techniques and very easy method

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  22. good technique

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  23. good techniques ,,

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  24. NICE BUT I WANT SO MANY SHORTCUTS

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  25. thank you very much for your help

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  26. there are several questions of same numeric value such as
    4+44+444+4444+44444
    for these type always remember 1+11+111+1111+11111 = 12345
    now multiply the term by 4 is ur answer.

    n when the terms are in decimal such as
    .8+.88+.888+.8888+.88888
    then the sum of .1+.11+.111+.1111+.11111 is .54321
    now multiply the term by 8 is ur answer..

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  27. Superb work....hats off.........

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  28. thanx shiv rk madam U made my day

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  29. 101+1001+2003+30005+9056
    give short cut method for these type of questions

    ReplyDelete

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