这题怎么解 ?? 请牛人指点
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
原本是1个1,50个0,减完74末尾两位变成26,前面剩下48个9
9*48+2+6=440
选C.
如果MM做的是GWD或者其他有题号的题的话可以搜索置顶帖。
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