1、GRE（ QUANTITATIVE）练习试卷 12及答案与解析 1 423,700,000=4.23710 to the power of _ 2 3.76105=_ 3 (2.50104)(1.25103)= _ 4 6.4710-5)=_ 5 9.832104=_ GRE（ QUANTITATIVE）练习试卷 12答案与解析 1 【正确答案】 When dealing with scientific notation, the power that 10 is raised to gives you the number of spaces you must move the decima
2、l place, either to the right (for a positive value), or to the left (for a negative value). To turn 4.237 into 423,700,000, you must move the decimal place 8 spaces to the right. Therefore, 10 needs to be raised to the power of 8 (108). 2 【正确答案】 To solve this problem, you must simply move the decima
3、l point the number of times indicated by the power to which 10 is raised. Since you are given 105, you know that you must move the decimal point 5 spaces to the right, because the exponent is a positive number. This gives an answer of 376,000. 3 【正确答案】 This problem can be set up as . When dividing l
4、ike bases, you subtract your exponents, so 104+103=101. You are left with 2101. Since 10 to the first power is 10, the correct answer is 20. 4 【正确答案】 You are given a negative value for the power to which 10 is raised (-5). This means that you must move the decimal point 5 spaces to the left to get the answer, which is 0.0000647. 5 【正确答案】 Because 10 is raised to the fourth power, move the decimal point 4 places to the right to get 98,320.
