英语数学题
1 How can you make 6 out of three 7's ?
2 How can you make 6 out of three 5's ?
3 How can you make 1,000 out of eight 8's ?
4 when do 2 and 2 make more than 4's ?
5 An elephant before two elephants,an elephant behind two elephants,an elephant between two elephants.How many elephants?
1 How can you make 6 out of three 7's ?
7-7/7=6
2 How can you make 6 out of three 5's ?
5+5/5=6!
3 How can you make 1,000 out of eight 8's ?
8+8+8+8+88+888=1000!
4 when do 2 and 2 make more than 4's ?
Answer:When you are wrong!
5 An elephant before two elephants,an elephant behind two elephants,an elephant between two elephants.How many elephants?
Answer:There are 4 elephants.
1.The sum of n different natural numbers is less than50.the greatest possible value of n is----
2.Let a be the average of all odd prime numbers less than 50.The inreger,most close to a is----
3.If two even natural numbers x,y satisfy equation x的平方加100等于y的平方,x大于y then x乘y等于----
1. Since there are some controversies, I suppose 0 does not belong to natural numbers in this case. The answer is quite straight foward, 1+2+3+4+5+6+7+8+9=45. If we add 10, then the sum will exceed 50. So the greatest possible n is 9.
2. First of all, you can list all the odd prime numbers less than 50:3 5 7 11 13 17 19 23 29 31 37 41 43 47. Add them up, and calculate the average. The average a is equal to 23.3. Therefore the integer, most close to a is 23.
3. x^2+100=y^2,then (y-x)(x+y)=100, since x and y are natural numbers, x+y>0, y should be larger than x. I am afraid there is either something wrong with the problem or a typing mistake.
You can show me the original version of the problem 3.
The principal of a new elementary school sounded the alarm for fire training. It took a very long time to empty the building. It was evident that the schoolchildren were at risk. The school has three exterior doors. The main door is served by a wide corridor, the side door by a narrower corridor, and the rear door by a dog-legged corridor.
By experimenting with the classrooms adjacent to each of these doors, it was determined that:
About 1.5 minutes elapse between the announcement of an emergency and the first departure through each door.
Students and staff can file through the doors at these rates approximately 55 per minute through the main door, 30 per minute through the side door, and 25 per minute through the rear door.
About 450 persons are inside the building.
Calculate for the problem the minimum time until the building empties
a.4.1
b.1.5
c.5.3
d.5.6
e.8.18
answer:D
㈡ 英语数学题 简单
您好！
我为你进行题目讲解，【Fresh
asparagus
costs
$3.49
per
pound
and
fresh
snow
peas
cost
$1.89
per
pound
at
the
vegetable】意思为【新鲜的芦笋的价格是每磅3.49美元，新鲜的雪豌豆的价格是每磅1.89美元】||【Caitlyn
buys
1.8
ibs.
of
asparagus
and
2.45
ibs
of
snow
peas】意思为，【一个叫‘Caitlyn’购买了1.8磅的芦笋和2.45磅的雪豌豆】注意点：
英制重量单位，复数形式，发音pounds（镑）。
answer:3.49*1.8+1.89*2.45=$10.9125
希望您及时采纳我们的回答，祝贺你学业成功，欢迎追问！谢谢
㈢ 英语数学题（要算式）
有年龄各不相同的四个女孩和两个男孩。最大的13岁，最小的7岁，最大的女孩比最小的男孩大4岁，最大的男孩比最小的女孩大4岁，问最大的男孩几岁？
若最小的是男孩7岁，则最大的女孩11岁，那么最大的男孩13岁，最小的女孩9岁。因为有4个女孩，年龄各不相同，而9、10、11只能是三个女孩的年龄。与题不符。
所以最小的应该是女孩，年龄7岁，最大的男孩比最小的女孩大4岁，所以，最大的男孩有11岁。
㈣ 英语数学题（一共2道数学题）
正方形ABCD的周长的尺寸等于10厘米。段MN的长度等于5厘米和三角形MNC是等腰三角形。找回到五边形ABNMD的区答域。
在下面的三角形图中ABC是等腰直角三角形。 AM是垂直于BC和MN是垂直于AC。找到三角形跨国公司的面积与三角形ABC的7815622的比例
㈤ 英文数学题
设减制掉的正方形边长为a，则盒子长为11-2a，宽为4-2a，高为a
所以体积v(a)=a(4-2a)(11-2a)=4a³-30a²+44a
=>v'(a)=12a²-60a+44，v''(a)=24a-60
令v'(a)=0，得12a²-60a+44=0，解得a=(15±√93)/6
∵4-2a>0，∴0<a<2，而v''((15-√93)/6)=-4√93<0
∴v((15-√93)/6)为其极大值点
而v(0)=v(2)=0<v((15-√93)/6)
∴盒子的最大体积为v((15-√93)/6)≈18.2
㈥ 英语数学题
(1)B
(2)B
(3)C
(4)C
(5)C
㈦ 英语数学题
^1.The sum of n different natural numbers is less than50.the greatest possible value of n is----
2.Let a be the average of all odd prime numbers less than 50.The inreger,most close to a is----
3.If two even natural numbers x,y satisfy equation x
答案：
1. Since there are some controversies, I suppose 0 does not belong to natural numbers in this case. The answer is quite straight foward, 1+2+3+4+5+6+7+8+9=45. If we add 10, then the sum will exceed 50. So the greatest possible n is 9.
2. First of all, you can list all the odd prime numbers less than 50:3 5 7 11 13 17 19 23 29 31 37 41 43 47. Add them up, and calculate the average. The average a is equal to 23.3. Therefore the integer, most close to a is 23.
3. x^2+100=y^2,then (y-x)(x+y)=100, since x and y are natural numbers, x+y>0, y should be larger than x. I am afraid there is either something wrong with the problem or a typing mistake.
You can show me the original version of the problem 3.
㈧ 用英语出的数学题 20道
1.
40%
of
the
students
in
a
school
are
boys.lf
there
are
240
boys,
how
many
student
are
therein
the
school?
2.
a
boy
has
finished
reading
160pages
of
a
story
book
and
he
finds
that
is
20%
of
the
book
left.how
many
pages
are
there
in
the
book?
3.
Among
the
800
people,
70%
like
swimming.How
many
people
like
swimming?
1、学校40%的学生是男孩，如果这里有240个男孩，那么学校有多少学生？
240/40%=600
2、一个男孩看完了160页故事书，他发现还有20%没看，问这本故事书多少页？
160/（1-20%0）=200
3、800人中，70%的人喜欢游泳，请问有多少人喜欢游泳？
800*70%=560
㈨ 英语数学题
去satonline看看 吧，有真正的模拟卷可以做
㈩ 英语数学题
遇到真正不懂的问题来联自系还是去询问老师，让老师面对面地给你详细的解答，在网上答案也只能得到答案的本身，基本无法得到问题与答案的缘由，还是老师比较能为你解释清楚。老师的职责就是传道授业解惑，所以建议学习上遇到难题最好标记下来，等到得到老师详细的解答后再进行自我消化，这样学到的知识才能是你自己的。