a) \(\left(-4\right).125.\left(-25\right).\left(-6\right).\left(-8\right)\)
\(=\left(-4\right)\left(-25\right)\left(-8\right).125.\left(-6\right)\)
\(=100.\left(-1000\right).\left(-6\right)\)
\(=600000\)
b) \(\left(-98\right)\left(1-246\right)-246.98\)
\(=\left(-98\right)\left(-245\right)-246.98\)
\(=98.245-246.98\)
\(=98.\left(245-246\right)=98.\left(-1\right)=-98\)
a, (-4 ) * [(+125)