GWD23-Q33

[k06922001]

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

Ans:C
我連題目的意思都不太懂...請指教!!!謝謝

[Penny Lee]

If 10^50 – 74 is written as an integer in base 10 notation, what is the sum of the digits in that integer?

10的50次方減掉74後的每位數加起來的總和

10^50 總共有50個零,100-74=26,借位扣掉74後只剩下48個9

48*9+6+2=440