Evaluate :- $40 - (- 30) + 10 - (- 9)$

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Solution

The solution of $40 - (- 30) + 10 - (- 9)$ is as follows :-
$40 - (- 30) + 10 - (- 9) = 40 + 30 + 10 + 9$
$= 89$
Hence, the result is $89$ .

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