jmc

We see that $1901=1800+101$, $1902=1800+102$, etc. Each term in the first set of numbers is $1800$ more than the corresponding term in the second set; Because there are $93$ terms in the first set, the expression can be paired up as follows and simplified: $$\begin{gathered} (1901-101)+(1902-102)+(1903-103)+\cdots +(1993-193) \\ =1800+1800+\cdots +1800 \\ =(1800)(93) \\ =\boxed{167,400} \end{gathered}$$