Ответ:
\(6^2:8^2+2^2=36:64+4=\frac{9}{16}+4=\frac{9}{16}+\frac{64}{16}=\frac{73}{16}=4\frac{9}{16}\).
\((84-20)^2\cdot100=64^2\cdot100=4096\cdot100=409600\).
Ответ: 1) \(4\frac{9}{16}\); 2) \(409600\).
\(6^2:8^2+2^2=36:64+4=\frac{9}{16}+4=\frac{9}{16}+\frac{64}{16}=\frac{73}{16}=4\frac{9}{16}\).
\((84-20)^2\cdot100=64^2\cdot100=4096\cdot100=409600\).
Ответ: 1) \(4\frac{9}{16}\); 2) \(409600\).