Solution

Ist Step: Add the right most digits of all the numbers to be added and put a mark. 2 + 9 + 3 = 14 It is 14 so we will write 4 and carry 1.              4   IInd step: Add the next digit to the left of all the numbers i.e. 6 + 4+ 2 = 12 and plus 1 that we carried i.e. 13, so we will write 3 and carry 1.                                  3 4    IIIrd step: Add the next digit to the left of all the numbers i.e. 7 + 3 + 3 = 13 and plus 1 that we carried i.e. 14, so we will write 4 and again carry 1.                                   4 3 4    IVth step: Add the next digit to the left of all the numbers i.e. 4 + 6 + 5 = 15 and plus 1 that we carried i.e. 16.                   1 6 4  3 4