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Math 5: More Than Just a Fraction Bar 49 Views
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Description:
So guess what? Fractions are just the same thing as division... That one made us question reality for a few weeks.
Transcript
- 00:13
We often think of fractions as parts of larger wholes, right? [fractions of circle]
- 00:16
Like, say we have a whole pizza…
- 00:18
….one eighth might be the fraction that's left after we're done chowing down. [pizza fractions represented]
- 00:22
…What?
- 00:23
We were hungry.
Full Transcript
- 00:24
And sure, that might make fractions seem puny and unimportant, like they're just leftovers. [sad fraction leftovers]
- 00:28
Which… hey, we love leftovers.
- 00:30
No complaints here.
- 00:31
However, it turns out there's a lot going on in a fraction. [numbers fly by]
- 00:34
You might have noticed that all fractions have a little line in their middle, like they're
- 00:38
wearing a little belt. [adorable fraction belts]
- 00:40
That lil' belt is called the fraction bar. [fraction bar labelled]
- 00:42
And it's not just there to look stylish, even though fraction bars are definitely slimming. [runway fraction]
- 00:46
It turns out the fraction bar is actually a division sign in disguise. [bar turns into division sign]
- 00:51
Every fraction has a numerator above the fraction bar…
- 00:54
…and a denominator down below. [fraction diagram]
- 00:56
And even though it's fine and dandy to leave a fraction as a fraction, we can also transform
- 01:01
it into a division. [Coop illustrates concept]
- 01:03
We just take our numerator…
- 01:04
…and divide it by the denominator. [fraction division shown]
- 01:05
Plus, if you actually want to carry out the division, you'll get a decimal number, free
- 01:11
of charge. [person celebrates decimals]
- 01:12
Fractions…they really are the gift that keeps on giving. [person opens disappointing gift]
- 01:14
Oh, and pro-tip: never give fractions as presents.
- 01:18
They're the number two most re-gifted gift, right after candles.
- 01:21
Anyway…it kinda makes sense that we should be able to translate from fractions to decimals. [fraction turns into decimal]
- 01:26
Sure, we don't often talk about having "0.125 of a pizza," but decimals are still a handy
- 01:32
tool for representing parts of wholes… [pizza man is confused]
- 01:34
…and the fraction bar provides a great bridge from fractions to decimals.
- 01:38
Luckily for you, writing a fraction bar only requires you to draw a tiny horizontal line… [person draws fraction]
- 01:42
…rather than making an actual bridge.
- 01:44
It'd be a real pain if you needed a few tons of steel and concrete every time you wanted [bridge building videos]
- 01:48
to make a fraction.
- 01:49
So there ya have it.
- 01:50
Thanks to the fraction bar, fractions aren't a bunch of puny nobodies, but the ambassadors [fractions guard world of decimals]
- 01:55
to the world of decimal numbers.
- 01:57
Now if you'd excuse us, we've got an eighth of a pizza to finish off. [person eats pizza]
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