2550 510 270 90 Overline 80 7

2550 – [510 – {270 – (90 – )}]

Answers:

2550 – [510 – {270 – (90 – \overline { 80 + 7 })}]
= 2550 – [510 – {270 – (90 – 87)}]
= 2550 – [510 – {270 -3}]
= 2550 – [510 – 267]
= 2550 – 243
= 2307