求助 GWD 1-14

tangjinxiong

if 10⁵⁰  -74  is written as an integer in base 10 notation, what is the sum of the digits in that integer?

A 424

B. 433

C. 440

D. 449

E. 467

Answer is C. 

but i have no idea how to go about solving it.  Please hep!!!

thanks

casualwalk

9×48＋2＋6＝432＋2＋6＝440