Another Example With Four Digit and Four Number Addition Trick

Another Example With Four Digit and Four Number Addition
Let’s try it for 2345 + 5678 + 8901 + 7654.

First Step Divide them into double column like previous example for adding 3 digit number.

   2 3    4 5

+ 5 6    7 8

+ 8 9    0 1

+ 7 6    5 4
------------

Third step is  add right most column.

      1

   2 3    4 5                   Second Step

+ 5 6    7 8                   (80 - 2) + 45 = 123 

+ 8 9    0 1                   123 + 01 = 124

+ 7 6    5 4                   124 + (50+4) =178
-------------------------------------------------

2 4 5    7 8                   1 is carried over

                                     1 + 23 = 24
                                    (20 + 4) + 56 = 80  

                                     80 + (90-1) = 169

                                   (170 -1) + (70 +6) = 245

And finally answer 24578.