a)

$32\cdot {\left(-\frac{1}{2}\right)}^3-2,4:{\left(0,4\right)}^2={\cancel{32}}^4\cdot \left(-\frac{1}{{\cancel{8}}_1}\right)-2,4:0,16=-4-240:16=-4-15=-19$

Pomocnicze obliczenia pisemne:

$\begin{array}{l}\underline{15}\\ 240:16\\ \underline{-16}\\ 80\\ \underline{-80}\\ 0\end{array}$

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b)

$\frac{{\left(-1\frac{1}{4}\right)}^2:1,25+\frac{3}{8}}{{\left(1-\frac{7}{8}\right)}^2}=\frac{{\left(1\frac{1}{4}\right)}^2:1\frac{1}{4}+\frac{3}{8}}{{\left(\frac{8}{8}-\frac{7}{8}\right)}^2}=\frac{{\left(1\frac{1}{4}\right)}^{2-1}+\frac{3}{8}}{{\left(\frac{1}{8}\right)}^2}=\frac{1\frac{1}{4}+\frac{3}{8}}{\frac{1}{64}}=\frac{1\frac{2}{8}+\frac{3}{8}}{\frac{1}{64}}=\frac{1\frac{5}{8}}{\frac{1}{64}}=$

$=\frac{13}{8}:\frac{1}{64}=\frac{13}{{\cancel{8}}_1}\cdot \frac{{\cancel{64}}^8}{1}=104$