integein 写错了是integer in.
假如10^50-74写作一个十进制的整数,那么这个整数的各个数字的总和是多少?
10^3 = 1000 - 74 = 926
10^4 = 10000-74 = 9926
10^5 = 100000 - 74 = 99926
规律：50-2=48个9和26
所以：
48*9+2+6
= 432 + 2 + 6
= 440
C
GMAT数学if 10^50-74 is written as an integein base10 notation.
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