Question

Multiple Choice Questions (MCQs)
3. The value of (8'-9')'+(4-'-9', 'is
(b) 10
(c) 25
(d) 14
(a) 5
10​

Answer 1

$(8 - 9) + (4 - ( - 9)) \\ ( - 1) + (4 + 9) \\ - 1 + 13 \\ + 12$

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Answer 2

\begin{gathered}(8 - 9) + (4 - ( - 9)) \\ ( - 1) + (4 + 9) \\ - 1 + 13 \\ + 12\end{gathered}

(8−9)+(4−(−9))

(−1)+(4+9)

−1+13

+12

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