美国大联盟每日练习-Day23
目前所选题目适合小学高年级学生。How many diagonals does a regular pentagon have? 解析:五角形有多少条对角线?多边形的对角线公式为n(n−3)/2,代入5,可得出答案5。What i...
美国大联盟每日练习-Day24
目前所选题目适合小学高年级学生。True/False: If the sum of three different prime numbers is an even number, then the product of these thr...
美国大联盟每日练习-Day25
目前所选题目适合小学高年级学生。If I toss a fair coin 4 times, what is the probability that I first toss 2 heads and I then toss 2 ...
美国大联盟每日练习-Day26
目前所选题目适合小学高年级学生。提示:几何题最好画示意图。A square is formed by joining the midpoints of each side of a larger square. If the area of...
美国大联盟每日练习-Day27
目前所选题目适合小学高年级学生。What is the ratio of circle C’s area to the square of C’s circumference?解析:本题注意审题即可。求的是圆形的面积与其周长的平方比。一定要...
美国大联盟每日练习-Day28
目前所选题目适合小学高年级学生。If a, b, and c are unequal positive integers, what is the least possible value of abc/a+b+c?解析:本题涉及...
美国大联盟每日练习-Day29
目前所选题目适合小学高年级学生。今天的练习,主要涉及指数的计算。相关公式如下:同底数幂相乘,底数不变,指数相加;(a^m)*(a^n)=a^(m+n)同底数幂相除,底数不变,指数相减;(a^m)÷(a^n)=a^(m-n)幂的乘方,底数不变...
美国大联盟每日练习-Day30
目前所选题目适合小学高年级学生。今天主要是排列组合~~In how many ways can 2 teachers be chosen from 4 teachers so that 1 teacher teaches algebra a...
美国大联盟每日练习-Day31
目前所选题目适合小学高年级学生。The length of a side of a regular pentagon is equal to what percent of its perimeter?A) 5%。   B) 20...
美国大联盟每日练习-Day32
目前所选题目适合小学高年级学生。What is the result when you divide 4/9 by 2?A) 2 /9       B) 8 /9    ...
美国大联盟每日练习-Day33
目前所选题目适合小学高年级学生。Which number is closest to the square root of 180?A) 12       B) 13  ...
美国大联盟每日练习-Day34
目前所选题目适合小学高年级学生。Which has the same value as 4^3×4^3 ?A) 4^6 B) 4^9 C) 16^6 D) 16^9解析:同底数相乘,指数相加,所以选AWhich has the same v...
美国大联盟每日练习-Day35
目前所选题目适合小学高年级学生。In a dog race, my dog finished 4th best (which was also 4th from last). If there were 2 ties (3 dogs in ...
美国大联盟每日练习-Day36
目前所选题目适合小学高年级学生。What is the probability of rolling a sum of 4, when you roll 2 standard 6-sided dice once?A) 1 /6 &...
美国大联盟每日练习-Day37
目前所选题目适合小学高年级学生。I counted backwards by 3's starting with the number 999. What was the 100th number I counted?A) 699 ...
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