Find the values of the letters in each of the following and give reasons for the steps involved


While adding 1 and B we get 0 i.e., a number whose ones digits is 0.

This is only possible when digit B is 9.


In that case, the addition of 1 and B will give 10 and, 1 will be the carry for the next step.


In the next step,


1 + A + 1 = B


Clearly,


A is 7 as 1 + 7 + 1 = 9 = B


Therefore, the addition is as follows:



Hence, the values of A and B are 7 and 9 respectively


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