CASIO/fx-991ES
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Hello Sir,

whenever i perform this subtract operation on my calculator, it always gives me wrong answer.

the operation is

123456789123456789

-123456789123456788

it gives answer 0 instead of 1.

I am using Casio/ fx-991ES. please find a solution for it.

Thanks

Company: CASIO/fx-991ES
Country: India
State: Madhya Pradesh
City: Jabalpur

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