a: \(=0.75\left(3.46+96.54\right)=0.75\cdot100=75\)
b: \(=1.25\left(26.34-6.34\right)=20\cdot1.25=25\)
c: \(=15.2\left(0.75+0.5\right)+4.8\cdot1.25\)
\(=1.25\left(15.2+4.8\right)=1.25\cdot20=25\)
d: \(=7.2\left(5.15+3.35\right)+2.8\cdot8.5=8.5\cdot10=85\)