b****a 发帖数: 11 | 1 女儿6岁了,在国内时没有给她报什么“珠心算”班
到这后,我想教她一些简单的数学,都是20一内的加减法,我每天给她出10道题,一般
都很简单,每次听她数着手指头算,心里就觉得好笑,想当初,她娘在她这个年纪都被
选派参加数学竞赛(口算)
昨天他爸给她出了几道,她哭着说不会,因为,数数超过十了。哭着说“我的手不够了
”,你出的太难了!
现在很苦恼,想求教一下,哪位有好方法教孩子加减法的,我已经实在是没办法了 |
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A**H 发帖数: 4797 | 2 我觉得应该教她数数,一到二十九,经常数,等她想知道二十九后面是什么的时候就没
问题了。 |
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a*****g 发帖数: 19398 | 4 我这里上次围棋班有个活动也许你可以效仿——
答对一道题目会得一定分数,而一分可以得一个黑棋子,
10个黑棋子可以换一个白棋子。
(一定要用基本相同的东西,这样才能不破坏 Unit 的概念)
将来增加规则,答错了要扣分。
很快会发现加减法、进制,place value 这些美国数学教育最头痛问题都自然解决了。 |
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a*****g 发帖数: 19398 | 5 呵呵…… twenty nine 后面是 twenty ten, twenty eleven |
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l*****8 发帖数: 770 | 9 同以为是两岁。觉得人家这娃咋这聪明!我家小娃也是2岁,刚会数数到15,相对人家
,不能比啊,都开方根号了。 |
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i****f 发帖数: 432 | 10 晕,我也以为是2岁呢,还在想天哪,我家的落后不是一点半点啊,差点都想买lz推荐
的书了 |
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j******1 发帖数: 509 | 13 ls的说笑吧?我家娃上preschool都可以数到100了。我在家完全放羊。 |
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C*****2 发帖数: 20 | 17 要趋热打铁,让他上一些数学兴趣课外班,保持他对数学的兴趣和得到足够的挑战。是
天才也要用心培养的! |
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G******d 发帖数: 583 | 22 赞。我也想培养娃的数学潜力, 但他好像没兴趣。娃现在还在上幼儿园, 让他背个九九
乘法到现在还是被了新的忘了旧的。好像没有遗传到我这个家长理科的基因。
但他的reading却是班上名列前茅。
murderous
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j**********2 发帖数: 1495 | 23 year1 year2 是不是说你在公司工作的年头啊 |
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g******4 发帖数: 6339 | 25 671 Lincoln Ave,
Winnetka, IL 60093
03/06/12 Sold $1,585,000
12/15/88 Sold $875,000
http://www.zillow.com/homedetails/671-Lincoln-Ave-Winnetka-IL-60093/3360197_zpid/
----------------------------------------
$875,000 in 1988 Has the same buying power as:
$1,698,180.47 in 2012
https://data.bls.gov/cgi-bin/cpicalc.pl?cost1=875000&year1=1988&year2=2012
$1,698,180.47 > $1,585,000
房价的上涨并不能击败通货膨胀!!
hit,
to
home |
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P*******e 发帖数: 39399 | 26 37m的bonus到底是咋付的? 一次付清 还是五年一年一付?
反正37m是肯定要付的 工资帽的算法应该肯定是未来五年 每年7.4
A roster bonus is paid in its entirety on a particular date -- such as "the
5th day of the 2014 NFL league year", a new league year typically starts 30
days after the Super Bowl -- if that player is on the team on that day. It'
s counted against the cap the day the contract is signed, spreading out
evenly, but if it is ultimately not paid, the team will get what have
already been counted in previous years credited back toward t... 阅读全帖 |
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i**********p 发帖数: 1341 | 27 我没说javascript library有bug,我说的是usatt网站的bug. more specifically:
1. javascript library interface design很误导,month从开始,day从1开始,这是
不坑人是什么
2. 注意我post的title是"usatt league网站的bug"。usatt网站没有意识到month从0开
始,默认从1开始,这个inconsistency是个bug
FYI,bug出在usatt网站的dateStringCompare里用了
var date1 = new Date(year1, month1, day1);
var date2 = new Date(year2, month2, day2);
我几个小时之前给他们写信后,建议了fix (把month -1)。他们承认了这个问题,号称
已经fix了,你可以去check dateStringCompare是不是修正了(我没去check过)。估
计你试的时候已经是after fix了,所以正常。
// 这和浏览器无关。大浏览器的javascript int... 阅读全帖 |
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i*****e 发帖数: 6614 | 28 再加一个,不想要太多信用卡,所以打算选一张
* Get 15,000 bonus miles3 after your first purchase - which is enough
for 3 FREE roundtrip off-peak award tickets1
* Get up to 10,000 additional miles for balance transfers within 30 days
of account opening3
* Annual fee waived for the first year2
* Get complimentary $9 Fare Club membership
(a $39.95 value!)4
* Priority boarding and domestic priority check-in
* Earn 3 miles for every $1 spent on Spirit and 1 mile for every $1
spent anywhere el |
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y******n 发帖数: 4 | 29 本人是港大year2学生,下个学期要去UC Berkeley交换。想在这里请教下各位Berkeley
的生活费用大概怎样。比如交通费,吃饭,和住宿情况。
谢谢大街~ |
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s*****n 发帖数: 325 | 30 05年真题 第11道好奇怪啊
You r given the following data:
===============year1==year2
Tota===========12000==14000
Number of
Policyholders===25======30
The Estimate of variance of hypothetical means is 254
Determine the credibility factor for Year 3 using the nonparametric
empirical Bayes method.
=================================
知道a,m,求z,所以只要求v就OK,可是怎么都看不懂答案上那个v怎么出来的
有请强人解答 @@ |
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f***5 发帖数: 1569 | 31 If it is regression:
reg y x1 z
outreg2 using 1.xls, replace keep (x1 z)
reg y x2
outreg2 using 1.xls, keep (x2 z)
If it is others, I have a code like this, but not sure whether it can help u
. U need to use something like APPEND I guess. eg 1 and eg 2is not related
(1) forvalues i=1(1)16 {
use f_oos, clear
forvalues j=1(1)10{
rename f`i'_yr`j' year`j'
}
keep year1 year2 year3 year4 year5 year6 year7 year8 year9 year10
save f`i'_oos,replace
}
(2)
forvalues i=2(1)16 {
append using rs`... 阅读全帖 |
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q**j 发帖数: 10612 | 32 you do not need sql
data year1 year2 ... yearn;
set yourdata;
do yr = 1 to n;
if year = yr then output yeari;
end;
run;
something like this. you need to work out the details.
sql is verstile, but slow in many situations. |
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d********h 发帖数: 2048 | 33 why convert?
difference=(year1-year2)*365+(month1-month2)*12+(day1-day2); |
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