Mental Maths (Additions)

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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Shortcut Methods for Doing Calculations