Question

(-457) + (-123)+123+257

Answer 1

\(\left[\left(-457\right)+257\right]+\left[\left(-123\right)+123\right]\)

\(=\left(-200\right)+0=-200\)

Answer 2

\(\left(-457\right)+\left(-123\right)+123+257\)

\(=\left[\left(-123\right)+123\right]+\left[\left(-457\right)+257\right]\)

\(=0+\left(-200\right)=-200.\)