Respuesta:
1) 450-{6+[4-(3-1)]}
450-{6+[4-2]}
450-{6+2}
450-8
442.
2) 520+{8-3+[9-(4+2-1)]}
520+{8-3+[9-5]}
520+{8-3+4}
520+9
511.
3) (150-5) - [14+(9-6+3]
145 - [14+6]
145 - 20
125.
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Respuesta:
1) 450-{6+[4-(3-1)]}
450-{6+[4-2]}
450-{6+2}
450-8
442.
2) 520+{8-3+[9-(4+2-1)]}
520+{8-3+[9-5]}
520+{8-3+4}
520+9
511.
3) (150-5) - [14+(9-6+3]
145 - [14+6]
145 - 20
125.