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标题: 求助 GWD 1-14 [打印本页]

作者: tangjinxiong 时间: 2006-6-29 06:50 标题: 求助 GWD 1-14

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

作者: casualwalk 时间: 2006-6-29 13:30

9×48＋2＋6＝432＋2＋6＝440

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