Part adder

Today I used the part adder I had to work out 48 + 49 which was two digit numbers.I split the tens and ones column  so 48+40=88.After I added 88+2 = 90 and added 7.So the answer is 97.

For this way I split the 48 into 37 and 11. Then I added 11 with 49 and got 60. Then I added 37 with 60 and got my final answer, 97.