1.

27 – {13+4 –(8+4-1+3)}​

Answer»

4.

Step-by-step EXPLANATION:

27 - {13  + 4 - (8 + 4 - 1 + 3)}

14 + 4 - (8 + 4  - 1 + 3)

18  - (12 - 1 + 3)

18 - (11 + 3)

18 - 14

= 4.

HENCE PROVED.



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