Name: 有相同分母的混合數加法 (Adding mixed numbers with like denominators)
Uploaded: 2021-01-14T10:13:45.000Z
Duration: 2 min 53 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

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- [Instructor] What we're going to do in this video

to 不定詞

is to start thinking about adding mixed numbers.

Now just as a reminder of what a mixed number is,

It's called mixed because part of the way

we represent this number is there's a whole number,

the three, and then part is as a fraction, 2/8.

So let's think about how we might be able to add

So pause this video and see if you can have a go at this

All right, now let's work through this together.

Now there's a couple of ways that we could approach this.

You might recognize that three and 2/8ths is the same thing

as three plus 2/8ths, and five and 3/8ths

And so if we add these two things together

we're just adding really these four things together

and the order in which we add doesn't matter

so you could view this as three plus five

we are adding, and now what is three plus five?

Well if I have two of something, in this case eighths,

in this case eighths, I'm gonna have five

So this is going to be eight plus 5/8ths.

Now there's other ways that you might see

where people will write three plus 2/8ths

and then they will write right below that

they'll write the five in the ones place,

or in the whole number and there's only a ones place

in these whole numbers, so you'd write the five

and then the fraction you'd write right below the fraction.

where first we can look at the fractional part,

2/8ths plus 3/8ths is going to be equal to 5/8ths

and then three plus five is going to be equal to eight

eight and 5/8ths, you get eight and 5/8s.

but that will hopefully start to get you comfortable

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有相同分母的混合數加法 (Adding mixed numbers with like denominators)

approach

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express