Question

621-{[(117+3):5]-9}

Answer 1

=621-24+9=621-15=606

Answer 2

\(621-\left\{\left[\left(117+3\right):5\right]-9\right\}\)

\(=621-\left\{\left[120:5\right]-9\right\}\)

\(=621-\left\{24-9\right\}\)

\(=621-15\)

\(=606\)

Answer 3

\(621-\left\{\left[\left(117+3\right):5\right]-9\right\}\)

\(=621-\left\{\left[120:5\right]-9\right\}\)

\(=621-\left\{24-9\right\}\)

\(=621-15\)

\(=606\)