3 - (-1)³ = 3 - (-1) = 3 + 1 = 4
3 - (-0,3)³ = 3 - (-0,027) = 3 + 0,027 = 3,027
3 - \((-\frac{3}{5})^3\) = 3 - \(-\frac{27}{125}\) = 3 + \(\frac{27}{125}\) = \(\frac{375}{125} + \frac{27}{125}\) = \(\frac{402}{125}\) = 3\(\frac{27}{125}\)
(-1)² - \(\frac{5}{16}\) = 1 - \(\frac{5}{16}\) = \(\frac{16}{16} - \frac{5}{16}\) = \(\frac{11}{16}\)
\((-\frac{3}{4})^2 - \frac{5}{16}\) = \(\frac{9}{16} - \frac{5}{16}\) = \(\frac{4}{16}\) = \(\frac{1}{4}\)
Ответ: a) 4; 3,027; 3\(\frac{27}{125}\); б) \(\frac{11}{16}\); \(\frac{1}{4}\)