\(75\times75-75+75\div75\)
\(=75(75-1)+(75\div75)\)
\(=75\times74+1\)
\(=5550+1\)
\(=5551\)
\(\leftrightarrow\)
\(75\cdot75-75+7\text{ : }75=?\)
\(\Rightarrow\)
\(75\cdot75-75+75\text{ : }75\)
\(=75\cdot74+1\)
\(=5550+1\)
\(=5551\)
\(\leftrightarrow\)