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If the digits represented by A and B satisfy the following subtraction problem, what is the nonnegative difference of the digits represented by A and B?

 May 22, 2020
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If, in the left-hand column, you subract B from A and not get a remainder, B must be just 1

smaller than A.

Since there is no remainder in the 4's column, there must have been a "borrow" in the 1's

column, resulting in the A of the 4's column becoming reduced to the value of B.

 

A is one greater than B.

 May 22, 2020

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