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      1. 留學網 > sat考試 > 5月新SAT考試將至:中國考生數學優勢不再

        5月新SAT考試將至:中國考生數學優勢不再

        發布時間:2017-04-22編輯:梁雅

          通過新舊SAT對比和新SAT考查知識點分析,我們來看看中國學生還能繼續延續以往在數學科目上的優勢嗎?今年新SAT考試登場,中國學生是否還能繼續延續以往在數學科目上的優勢呢?一起來看看吧。

          新舊SAT對比:
        5月新SAT考試將至:中國考生數學優勢不再

          新SAT考查知識點:
        5月新SAT考試將至:中國考生數學優勢不再

          5月新SAT考試將至:中國考生數學優勢不再
               題目分析

          新SAT數學不僅在知識點考查方面更加貼近實際生活應用,包括題目和題型也變得更加接地氣。最明顯的表現是題目長度大大增加,單詞難度加大,長句出現頻率增加,這對學生的閱讀能力和速度提出了更高的要求。

          閱讀量增加

          與美國學生相比,以往中國學生贏在數學知識和計算能力,但中國學生在專業英語詞匯量、與實際生活聯系、邏輯思維、批判性思維閱讀上與美國學生存在很大差距。

          應對策略

          所以,在單詞方面,學生首先要對數學專業詞匯以及常見表達熟練掌握,同時在平常也需要更多積累其他STEM相關領域詞匯和背景知識。針對題目中的長句,則需要快速理解題意辨識出考查的知識點,然后分析句子結構,迅速剝離出與解題相關的數據信息。包括題目最后的問題也會經常出現在長句中,如果句子沒有讀懂,那么很有可能會減緩做題速度甚至會影響解題切入點。

          例題:An online store receives customer satisfaction ratings between 0 – 100, inclusive. In the first 10 ratings the store received, the average (arithmetic mean) of the ratings was 75. What is the least value the store can receive for the 11th rating and still be able to have an average of at least 85 for the first 20 ratings.題目主要意思為:一家在線商店會收到評分為0-100分之間的顧客滿意度評價,收到的前10個評價得分平均為75,如果要保證前20個評價的平均得分為85,商店收到的第11個評價的最少為多少分?大家可以發現題目非常貼近我們的生活,在網購如此發達的中國,相信大家作為買家都給過店家評價吧。在這道題中,商店需要計算好評率。這類題我們都可以看做“應用題”,解答應用題首先需要將題目給出的情境抽象化:在0-100中先按順序選擇10個數,他們的平均數為75,如果再依次選擇10個數,為了保證這20個數的平均數為85,第11個數最少應該是幾?

          然后再根據我們已經掌握的相關知識點解題即可。

          題目的內容和形式更加多樣化:與實際生活、工作相結合

          要求:積累與留心更多社會常識與經驗

          例題:A bank has opend a new branch and ,as part of a promotion, the bank branch is offering $1,000 certificates of deposit at an interst rate of 4% per year, compounded semiannually. The bank is selling certificates with terms of 1,2,3 or 4 years. Which of the following fuctions gives the total amount, A, in dollars, a customer will receive when a certificate with a term of k years is finnally paid.A) A= 1,000(1+0.04K)B) A=1,000(1+0.08K)C) A=1,000(1.04)kD) A=1,000(1.04)2k

          解讀:銀行幾乎與每個人的生活都息息相關,存款利率與收益具體如何計算則是這道題考查的重點。

          例題:The cost of using a telephone in a hotel meeting room is $0.20 per minute. Which of the following equations represents the total cost c, in dollars, for h hours of phone use?A) c = 0.20(60h)B) c = 0.20h+60C) c = 60h/0.20D) c = 0.20h/60

          解讀:在實際生活中,在酒店除了房間費用,其他費用包括電話,mini-bar里的食品,甚至網絡都是要收取相應費用的。這道題則是需要我們根據題目提供的信息建立酒店會議室電話費的計算公式。

          圖表題增加

          要求:提高解讀和整合數據能力

          例題:Michael swam 2,000 yards on each of eighteen days. The scatterplot above shows his swim time for and corresponding heart rate after each swim. The line of best fit for the data is also shown. For the swim that took 34 minutes, Michael’s actual heart rate was about how many beats per minutes less than the rate predicted by the line of best fit?A) 1B) 2C) 3D) 4

          解讀:想要看懂圖表,就需要理解圖表中橫縱軸以及點、線對應題目中的哪些文字信息。 這道題中則需要重點理解根據已知數據做出的預測與實際數據之間是會存在偏差,然后根據題目要求計算出實際差值。

          與STEM,美國社會科學知識等領域緊密相關

          要求:具備相應的科學背景知識、信息處理能力以及邏輯推理能力

          例題:a = 1,052 + 1.08tThe speed of a sound wave in air depends on the air temperature. The formula above shows the relationship between a, the speed of a sound wave, in feet per second, and t, the air temperature, in degrees Fahrenheit (°F). Which of the following expresses the air temperature in terms of the speed of a sound wave?A) t = (a-1052)/1.08B) t = (a+1052)/1.08C) t = (1052-a)/1.08D) t = 1.08/(a+1052)

          解讀:這答題涉及物理學科相關知識,題目中已經給出公式以及相應解釋。只要理解變量的意義以及相應單位,就可以按照題目要求解題。

          例題:The number of states that joined the United States between 1776 and 1849 is twice the number of states that joined between 1850 and 1900. If 30 states joined the United States between 1776 and 1849 and x states joined between 1850 and 1900, which of the following equations is true?A) 30x=2B) 2x=30C) x2=30D) x+30=2

          解讀:美國是聯邦制國家,各個州加入聯邦的時間不同,這道題以此背景,實際上考查學生找到變量和常量,建立簡單方程式的能力。

          例題:In order to determine if treatment X is successful in improving eyesight, a research study was conducted. From a large population of people with poor eyesight,

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