Question

(43-863)-(137-57)-900

Answer 1

`(43-863)-(137-57)-900`

`= 43-863-137+57-900`

`=(43+57)-(863+137)-900`

`=100-1000-900`

`=-1800`

Answer 2

\(\left(43-863\right)-\left(137-57\right)-900=\left(-820\right)-80-900=\left(-900\right)-900=-1800\)

Answer 3

\(\left(43-863\right)-\left(137-57\right)-900\)
\(=43-863-137+57-900\)
\(=\left(43+57\right)-\left(863+137\right)-900\)
\(=100-1000-900\)
\(=-1800\)

Answer 4

=-1800