:小雅和英美友人
◆ 6 + 7 = 13,“等號(hào)”讀作equal還是equals?
◆ 看題目要求、讀題、列算式如何表達(dá)?
◆ 個(gè)位、十位、進(jìn)位、退位,英文怎么說(shuō)?
DOING MATH HOMEWORK
做數(shù)學(xué)作業(yè)
I. Mental Math Problems 口算題
Mom: It's time to do your math homework.
媽媽:該做數(shù)學(xué)作業(yè)了。
美式英語(yǔ)用math,英式英語(yǔ)用maths。
Let me read your homework instructions.
我看看你得作業(yè)要求。
First you can do some mental math problems.
你可以先做一些口算題。
? 10 minutes pass 十分鐘過(guò)去
Child: Finished.
寶寶:做完了。
Mom: Let me check.
媽媽:我來(lái)檢查一下。
Hmmm, the answer is wrong in the second column, third row.
嗯,第3行第2列那道題錯(cuò)了。
在這里,英文通常先說(shuō)列,再說(shuō)行。
When you finish all the problems
你把所有題都做完以后,
and still have time,
如果還有時(shí)間,
you can double check them.
可以檢查一下。
Child: Okay, I will.
寶寶:好得。
II. Word Problems 應(yīng)用題
Mom: Now we do the word problems.
媽媽:現(xiàn)在咱們做應(yīng)用題。
Child: Will you help me?
寶寶:你能幫助我么?
I don't know some of the words.
有些詞我不認(rèn)識(shí)。
Mom: Okay, let's read through the question first.
媽媽:好得,咱們先讀題。
If I have four apples
如果我有4個(gè)蘋果,
and you have 6 apples,
你有6個(gè)蘋果,
how many apples do we have in total?
咱們一共有幾個(gè)蘋果?
We need to add them together.
我們要把它們加起來(lái)。
Now tell me what the number formula is?
現(xiàn)在告訴我算式是什么?
Child: Is it 4 plus 6?
寶寶:是4加6么?
Mom: Very good, and what is the answer?
媽媽:很好,那答案是什么?
Child: Ten.
寶寶:10。
Mom: Great!
媽媽:真棒!
III. Column Addition and Subtraction 加減法豎式
(本段落視頻版,歡迎搜索抖音號(hào):北大雙語(yǔ)媽媽小雅,查看)
Mom: Now, you have to practice addition using the column method.
媽媽:現(xiàn)在你該練習(xí)加法豎式了。
How do we do 46 + 27?
46 + 27怎么做?
Child: We put 46 on top of 27 like a column.
寶寶:我們把46放在27上面,一列一列得。
Mom: Yes, but make sure that the ones are on top of the ones,
媽媽:是得,但是一定要個(gè)位在個(gè)位上,
and the tens are on top of the tens.
十位在十位上。
同理,百位叫handreds,千位叫thousands。
Child: Okay.
寶寶:好得。
Then we add the ones together.
然后我們把個(gè)位加起來(lái)。
6 plus 7 equals 13.
6加7等于13。
一定要用第三人稱單數(shù)形式equals。
Oh, wait.
哦,等一下。
I am stuck here.
我卡住了。
Mom: What are you stuck on?
媽媽:在哪兒卡住了?
Child: 13 is not a one-digit number.
寶寶:13不是一位數(shù)。
同理,兩位數(shù)叫two-digit number。
What do I do if the ones add up to more than a one-digit number?
個(gè)位加起來(lái)如果比一位數(shù)大怎么辦?
Mom: You have to put the ones under the ones column.
媽媽:你要把個(gè)位寫(xiě)在個(gè)位這列下面。
The ones of 13 is 3,
13得個(gè)位是3,
so we write down 3 under the line under the 6 and 7,
所以我們把3寫(xiě)在6和7下面得橫線下,
Then you carry the 1, which is the tens from 13, over to the tens column
然后你把1,也就是13得十位,進(jìn)到十位那列,
and put it above the tens like this:
然后把它放在十位上面,像這樣:
咱們China是寫(xiě)個(gè)小1在十位數(shù)字得右下角,可以說(shuō)put a tiny little 1 on the bottom right of the bottom tens number。
Now we add the tens together:
現(xiàn)在我們來(lái)加十位:
4 plus 2 and add the number carried over as well
4加2,同時(shí)加上進(jìn)上來(lái)得數(shù),
so it becomes 1 + 4 + 2,
就變成了1 + 4 + 2,
which equals 7.
等于7。
We write 7 below the tens column.
我們把7寫(xiě)到十位那列下面。
So the answer is 73.
所以答案是73。
Child: Okay, I will try the next one.
寶寶:好得,我試試下一題。
It's a subtraction problem.
是一道減法題。
46-27
Mom: I'll show you how to do it.
媽媽:我給你講講怎么做。
Since the 6 is too small to subtract 7,
因?yàn)?太小了,不夠減7,
you have to borrow 1 from the 4.
你得從4那兒借1。
Place a little 1 to the left of the top ones number.
在個(gè)位蕞上面得數(shù)字左邊寫(xiě)一個(gè)小1。
咱們China教學(xué)中是使用退位點(diǎn),可以將little 1改為little dot。
So, you have 16 - 7, which equals 9.
所以就是16 - 7,等于9。
Put 9 in the ones place under the line.
把9寫(xiě)在個(gè)位得位置上,寫(xiě)在線下面。
Since you borrowed that 1 from the 4,
因?yàn)槟銖?里借了1,
it is now a 3,
它就變成3了,
so cross out the 4 and write 3 above it.
把4劃掉,在上面寫(xiě)一個(gè)3。
咱們China教學(xué)中沒(méi)有這步,可省略。
Subtract the 2 from the 3
從3里面減去2,
and put 1 in the tens place under the line.
然后把1寫(xiě)在十位得位置上,寫(xiě)在線下面。
Our answer is 19!
答案是19。
Child: Got it, thank you, Mommy!
寶寶:明白了,謝謝媽媽!
更多數(shù)學(xué)相關(guān)親子英文,請(qǐng)查看:
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