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Addition Shortcuts (Mental Maths)

I**n this post, we will show you how to do Additions Mentally. Have a look at the Following Examples........**
**342 + 557 + 629 + 746 + 825 = ?**
**W**hen 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 = ?**
**H**ave a look at the solution below... **(Click on the image to get a better view)**** **** **

**1598 + 5423 + 4627 + 7953 + 8675 = ?**

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ReplyDeleteI 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

ReplyDelete1000+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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ReplyDeletethere are several questions of same numeric value such as

ReplyDelete4+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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