(1/2)^3 * 512 - (-216)
(1/2)^3 * 512 - (-216) ?
$$\\({1\over 2})^3 * 512 - (-216)\\\\ ={1\over 2^3} * 2^9 +216\\\\ ={2^9\over 2^3} +216\\\\ =2^{9-3} +216\\\\ =2^6 +216\\\\ =64 +216\\\\ =280$$
(1/2*1/2*1/2)*512-(-216)
1/8*512-(-216)
1/8*512+216
64+216
280