Question

Predict which digit will change when you add and subtract 1, 10, 100 and 1000.
4567

Answer 1

when we add 1 7will change.
when we add 10 6 will change.
when wr add 100 5 will change.
when wr add 1000 4will change.

Answer 2

when we add 1 the once digit will change
when we add 10 the tens digit will change
when we add 100 the hundreds digit will change
same in case of thousand
same in case of subtraction