\(a,369-\left(\left|-206\right|-15\right)-\left(-206+\left|-369\right|\right)\)

\(=369-\left(206-15\right)+206-369\)

\(=369-206+15+206-369\)

\(=\left(369-369\right)+\left(-206+206\right)+15\)

\(=0+0+15=15\)

\(b,345-150:\left[\left(3^3-24\right)^2-\left(-21\right)\right]+2016^0\)

\(=345-150:\left[\left(27-24\right)^2+21\right]+1\)

\(=345-150:\left[3^2+21\right]+1\)

\(=345-150:30+1\)

\(=345-5+1=341\)

\(c,-2+16-12+...+96\)

Ta có: \(\left[-2+...+\left(-92\right)\right]+\left[6+16+...+96\right]\)

Hai bên có \(10\) số hạng.

\(\Rightarrow\left\{\left[-2+\left(-12\right)\right].10:2\right\}+\left\{\left[6+16\right].10:2\right\}\)

\(\Rightarrow510+\left(-470\right)=40\)

đường cao = \(\sqrt{20}=2\sqrt{5}\)

67 + 466 = 533

lãi 400%