The Part Adder

I used the Part adder to solve a 2 digit number problem

 49 + 48.

1.  I first split 48 to 45 and 3 I then split 49 to 45 and 4.  I then added the tens 45 + 45 which makes 90. Then I added the ones 3 + 4 which makes 7.  Then I add all of them together 90 + 7 = 97

1.  I first split 48 to 40 + 8 I then split 49 to 40 + 4 + 3.  I then added the tens 40 + 40 which makes 80. Then I added the ones 8 + 2 = 10 + 7 which makes 17.  Then I add all of them together 80 + 17 = 97.