The Official (CollegeBoard) SAT Math 1 - Practice 4
注意raw score 不是做对题的数目，要减去错的题数 ×0.25。做对46道题，做错4道题。
47 － 3×0.25 = 46, 分数770。
Errors: Q16, 30, 34.
10010= (102)10 = 1020
Or if you are not sure of equation, you can reduce it based on exponentiation definition
10010= 100 * 100 * 100 * 100 * 100 * 100 * 100 * 100 * 100 * 100
= 102 * 102 * 102 * 102 * 102 * 102 * 102 * 102 * 102 * 102
= 102 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2
= 1020
(10 * 1010)10 = (1011)10 = 10110 (This is correct)
(100 * 10)10 = (102 * 10)10 =(103)10 = 1030
10,000,000,000 = 1010
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