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标题: [求助]TT GWD 1-14 [打印本页]

作者: annika_shao    时间: 2007-7-18 11:28
标题: [求助]TT 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. 

能不能帮忙解释一下,题目是什么意思?看不明白


作者: Iawfy    时间: 2008-8-2 14:06

    

10^501后边有500,减去74后差有50digit,其中最后两位是26,那前边48digit都是9

所以是48910440


    

作者: jh1904    时间: 2008-8-2 14:11
48*9+2+6=440




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