Ответ:

  1. \(10110_2=1\cdot2^4+0\cdot2^3+1\cdot2^2+1\cdot2^1+0\cdot2^0=16+4+2=22_{10}\).
  2. \(123_5=1\cdot5^2+2\cdot5^1+3\cdot5^0=25+10+3=38_{10}\).
  3. \(745_8=7\cdot8^2+4\cdot8^1+5\cdot8^0=448+32+5=485_{10}\).
  4. \(296_{16}=2\cdot16^2+9\cdot16^1+6\cdot16^0=512+144+6=662_{10}\).

Ответ: \(10110_2=22_{10}\), \(123_5=38_{10}\), \(745_8=485_{10}\), \(296_{16}=662_{10}\).