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So if you had some number back in grade school like 123, well, why do we express this as 123?
在小学，像123这样的数，为什么我们要表达成123这样的呢？
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Well, it's a long time ago but it was elementary school, you know, maybe 3rd grade, 4th grade,
那是很久以前的事情了，应该是小学时候吧，那大概是三年级或者四年级，
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Just as in grade school when you're doing division and multiplication, you do it from left to right in terms of order of operations.
正像是在小学你做除法和乘法的时候,你毫不含糊地从左到右,按顺序做运算。
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My name is Maria D'Itria, and I teach 5th grade class at the Harvard Kent School in Boston.
我叫玛利亚。狄翠娅,我在波士顿的哈佛肯特学校教授五年级课程。
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But when I went to public school in ninth grade, that's when I was like, "Wow!"
但是当我上九年级时在公立学校上，那时我就觉得“哇”！
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I was kicked out of school when I was in third grade for refusing to salute the flag.
我在三年级的时候,因为拒绝向国旗敬礼而被退学。
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But all of you in this room probably remember what we technically call the base 10 system or decimal system because back in grade school or the like, you learned to count and add and subtract numbers by way of columns.
但是，在座的每一位可能都记得,这在小学的时候学的,以10为进制的系统或者十进制系统,通过数列方式学习数数和加减法。
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So now let me just do some grade school substitution.
接下来做一些简单的代换。
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0 So if you do for instance 11 divided by 10 in grade school, 1 that's 1 with the remainder of 1.
举个例子，11除以，得1余。
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3% of black school children in fourth grade are left behind proficiency levels.
做了评估，其中，在四年级的黑人孩子里,63%阅读能力较差，58%的西班牙孩子。
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you know, from going to public, or Catholic school from first to eight grade.
你知道，从天主教学校换去公立学校，从一年级到八年级
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When I was growing up, I went to Catholic school first through eighth grade.
我成长的时候，我上天主教学校一直到八年级，
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You might recall from grade school sometimes you put things in parentheses so that your addition happens first, then your multiplication, otherwise multiplication would happen by default first.
你们可能会想起小学时，将一些加法表达式,放在圆括号里，这样加法可以先计算，然后是乘法，否则，乘法默认先发生。
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The so called binary system, 1 these zeros and ones that you'd probably have some vague sense underlie all computers today actually reduced to the exact same grade school kind of math and system except with computers, 1 because it's a lot easier to use just two digits, zero and one.
所谓的二进制就是，你觉得模糊的0与,在电脑上计算,事实上可以简化为跟小学数学一样,只是在电脑上计算而已，因为它更容易，仅仅使用两个数字，0与。
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