(+2.5)+(-3.9) 2.56-(13/3-2.44) I-12I-(-3)+I-4I-(I-7-2I-8)

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(+2.5)+(-3.9) 2.56-(13/3-2.44) I-12I-(-3)+I-4I-(I-7-2I-8)
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(+2.5)+(-3.9) 2.56-(13/3-2.44) I-12I-(-3)+I-4I-(I-7-2I-8)
(+2.5)+(-3.9) 2.56-(13/3-2.44) I-12I-(-3)+I-4I-(I-7-2I-8)

(+2.5)+(-3.9) 2.56-(13/3-2.44) I-12I-(-3)+I-4I-(I-7-2I-8)
(+2.5)+(-3.9)
=2.5-3.9
=-1.4
2.56-(13/3-2.44)
=2.56-13/3+2.44
=5-13/3
=2/3
I-12I-(-3)+I-4I-(I-7-2I-8)
=12+3+4-(9-8)
=19-1
=18