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这一家一家的出相机，都没什么亮点啊

这一家一家的出相机，都没什么亮点啊# PhotoGear - 摄影器材

p*T2010-08-26 07:08

1 楼

我对数学题的英语理解可能有问题
1.
14.3-0.4x=2.6x+5.6
official answer: 12.43 my answer is 2.9
2.the equation below can be used to solve which of the following word
problems?
2x+15=4x
a. the price of four books is $15 more than the price of two books. what is
the price per book?
b. the price of two books is $15 more than the price of four books. what is
the price per book?
c. the price of four books equals $15. what is the price per book?
d. John bought certain number of $2 books and $4 books for a total of $15.
how many of each book did he buy?
offical answer:b my answer is a
=======================
Can anybody help me and explain? Thanks

j*h2010-08-26 07:08

2 楼

a*g2010-08-26 07:08

3 楼

你不用怀疑自己。
美国人大面上的数学烂是有目共睹滴。

is
is

【在 p*****T 的大作中提到】

: 我对数学题的英语理解可能有问题
: 1.
: 14.3-0.4x=2.6x+5.6
: official answer: 12.43 my answer is 2.9
: 2.the equation below can be used to solve which of the following word
: problems?
: 2x+15=4x
: a. the price of four books is $15 more than the price of two books. what is
: the price per book?
: b. the price of two books is $15 more than the price of four books. what is

l*a2010-08-26 07:08

4 楼

The second question is wrong for sure. A is right.
The first one, I just wonder how could you get that answer.

【在 a*****g 的大作中提到】

: 你不用怀疑自己。
: 美国人大面上的数学烂是有目共睹滴。
:
: is
: is

i*t2010-08-26 07:08

5 楼

gre研究生入学考试的数学，还不如中国初中生水平

l*a2010-08-26 07:08

6 楼

General part is easy, if you look at GRE subject math, it may not be so easy.

【在 i*****t 的大作中提到】

: gre研究生入学考试的数学，还不如中国初中生水平

i*t2010-08-26 07:08

7 楼

gre = 初中生
gre subject = 高考

easy.

【在 l**a 的大作中提到】

:
: General part is easy, if you look at GRE subject math, it may not be so easy.

E*e2010-08-26 07:08

8 楼

你这是嘲笑美国人的数学吧

is
is

【在 p*****T 的大作中提到】

l*a2010-08-26 07:08

9 楼

Lz的答案是x的值

【在 l**a 的大作中提到】

:
: General part is easy, if you look at GRE subject math, it may not be so easy.

S*s2010-08-26 07:08

10 楼

小时候作的中国习题集也经常有错误答案呀

l*a2010-08-26 07:08

11 楼

Yes, the question is not asking for x, only ask the side value?
Rounded?

【在 l******a 的大作中提到】

: Lz的答案是x的值

s*t2010-08-26 07:08

12 楼

那也不对。

【在 l**a 的大作中提到】

:
: Yes, the question is not asking for x, only ask the side value?
: Rounded?

l*a2010-08-26 07:08

13 楼

13.14 is close to 12.43,
the question has no more information?
If you look it as an equation, LZ is right, if it is part of an equation, it
is hard to say.

【在 s******t 的大作中提到】

: 那也不对。

l*a2010-08-26 07:08

14 楼

I said GRE subject math part, you are kidding me.
GRE subject math is for math major graduate school entrance.
I can not do it:)

【在 i*****t 的大作中提到】

: gre = 初中生
: gre subject = 高考
:
: easy.

l*a2010-08-26 07:08

15 楼

...数学这么严谨的东西，1就是1，2就是2，错就是错，没什么叫close

it

【在 l**a 的大作中提到】

:
: I said GRE subject math part, you are kidding me.
: GRE subject math is for math major graduate school entrance.
: I can not do it:)

s*t2010-08-26 07:08

16 楼

呵呵，一点都不 "close".
书上答案错了就是错了。没必要为之找理由。

it

【在 l**a 的大作中提到】