SSAT数学部分的考察内容不超过国内初中教学的知识范围,难点就在于都是采用英文命题,在理解应用题的题意时,一定要熟悉最常见的表达方式。题目中不会出现复杂的精确计算,但是考查考生的估算能力,所以计算器是不允许带入考场的。数学两个部分的难度和范围完全一样,SSAT会在数学两个部分之间插入一个非数学的部分,是为了让考生科学用脑。
很多同学在备考英制单位换算这部分知识时,明显感到无从下手。一是因为这类题目大多不会附上转换公式。二是因为美国采用是英制,中国采用是国际单位制。那么如何来应对这种情况呢?
例题1
Model trains are built on a scale of 1 inch:1 foot. If a particular model train is 3 feet7 inches long, how many yards long would the actual train be?
A. 14.3B. 28 C. 36 D. 43.5E. 57.75
常识:1 foot(英尺)=12 inches(英寸)= 1/3yard(码)
解析:
3 feet 7 inches = 3*12+7 = 43 inches,
因为 scale=1inch : 1foot,
所以the length of actual train = 43 feet = 43*1/3 yard = 14.3 yards
答案:A
例题2
What is the cost of nine ounces of cheese at $0.80 per pound?
A.$0.36 B.$0.45 C.$0.48 D.$0.52 E.$0.55
常识:1 pound (磅)= 16 ounces (盎司)
解析:
因为 1ounce=1/16 pound,
所以 9 ounces= 9*1/16 pound = 9/16 pound,
所以 cost=0.80*9/16=$0.45
答案:B
例题3
A tank of oil is three-quarters full. When full, the tank holds 56 gallons. How many quarts of oil are in the tank now?
A.56 B.112 C.168 D.192 E.224
常识:1gallon(加仑)= 4quarts(夸脱)
解析:
The volume of oil = 56*3/4 = 42 gallon = 42*4 quarts = 168 quarts.
答案:C
例题4
Which of the following gives the number of cents in a dimes, b nickels, and c quarters?
A. a/10+b/5+c/25
B.10/a+5/b+25/c
C. 10a+5b+25c
D. a+5b+50
E. 5a+10b+50c
常识:1 dime(10分铸币)= 10 cents(美分),1 nickel(5分镍币)= 5 cents(美分),1 quarter(25分硬币)= 25 cents
解析:
a dimes, b nickels, and c quarters =(10a+5b+25c)cents
答案:C
以上就是小编为大家整理的关于SSAT数学考点之单位换算的基本知识点汇总及例题讲解,希望对大家有所帮助。更多SSAT课程培训、SSAT考试时间表等问题可以咨询我们。
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