Question

25-427:[(36-27:3):3]+42:7×3
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Answer 1

25 - 427 : [ ( 36 - 27 : 3 ) : 3 ] + 42 : 7 × 3 =

25 - 427 : [ ( 36 - 9 ) : 3 ] + 6 × 3 =

25 - 427 : ( 27 : 3 ) + 18 =

25 - 427 : 9 + 18 =

25 - 47, ( 4 ) + 18 =

- 22, ( 4 ) + 18 = - 4, ( 4 )

Answer 2

$25-427:[(36-27:3):3]+42:7\cdot 3= \\ =25-427:[(36-9):3]+6\cdot 3=\\=25-427:(27:3)+18=\\=25-427:9+18=\\=25-\frac{427}{9}+18= \\=43-\frac{427}{9}=\\=\frac{387}{9}-\frac{427}{9}=\boxed{-\frac{40}{9}}$