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Home → maths → tricks → Addition Shortcuts (Mental Maths)

Addition Shortcuts (Mental Maths)

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 Addition Shortcuts (Mental Maths)



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.

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