a) \(2.25-24:2^3\)
\(=2.25-24:8\)
\(=\left(8:2\right).\left(25-24\right)\)
\(=4.1\)
\(=4\)
b) \(\left|-110\right|-54+\left(-110\right)-\left(-12\right)\)
\(=110-54+\left(-110\right)+12\)
\(=\left[110+\left(-110\right)\right]+54-12\)
\(=0+42\)
\(=42\)