新SAT数学每日练习:题目+重点词汇+解析!新SAT数学部分在考试中占据800分值,考生一定要在数学部分争取满分,拿满分自然要结合练习掌握考点。下面智课网为大家整理了新SAT数学每日练习题及答案解析。

  Read the following SAT test question and thenclick on a button to select your answer.

  In 2004, the number of people aged 16 years orolder in the United States was approximately223357000. According to the Bureau of Labor Statistics, at that time 66% of the populationaged 16 and older was employed, and women made up about 46.4% of this category.Approximately how many women aged 16 and older were employed in 2004?

  A.68400000

  B.104000000

  C.147400000

  D.157000000

  重点单词讲解:

  multiple ['mʌltipl]

  adj. 许多,多种多样的

  calculate ['kælkjuleit] v. 计算,估计,核算,计划,认为

  population [.pɔpju'leiʃən] n. 人口 ,(全体)居民,人数

  approximately [ə'prɔksimitli] adv. 近似地,大约

  category ['kætigəri] n. 种类,类别

  答案:D

  解析:

  Choice A is correct. The number of people aged 16and older who were employed in the United States in2004 can be found by calculating 66% of223357000.

  66% of 223357000 can be found as follows:

  0.66*223357000=147415620

  Hence 147415620 people aged 16 or older were employed in the United States in 2004.

  Of this number, 46.4% were women. To calculate the number of women in this age group whowere employed, find 46.4% of 147415620:

  0.464*147415620=68400847.68

  Therefore, approximately 68400000 women aged 16 and older were employed in the UnitedStates in 2004.

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