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
举报
我选C.
10^50=1后面50个0, 减74后变为48个9+2+6 = 440
发表回复
手机版|ChaseDream|GMT+8, 2025-6-27 15:59 京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
ChaseDream 论坛
© 2003-2025 ChaseDream.com. All Rights Reserved.