[求助]GWD-1-14

daizexia90

Q14:

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

bettyofarim

10^50=10000000....00000(50个0)

10^50-74=9999999...99926(50-2个9)

所以sum=48*9+2+6=440

daizexia90

thanks !!!!!!!