WEBVTT

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Tegyük fel, van egy törtünk,
ami 9/10,

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és hozzáakarunk adni
1/6-dot.

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Mivel lesz ez egyenlő?

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Amikor először ránézel
azt mondod:

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"Ó, eltérő a nevezőm!

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Nem egyrtelmű,
hogy hogyan kell összeadni."

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És ebben igazad van.

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Úgy tudunk ebben tovább haladni,
hogy megkeressük a közös nevezőt,

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hogy átalakítsuk 
mindkét törtet

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olyan törtté,
melyeknek közös a nevezője.

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Hogyan keresel 
közös nevezőt?

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Nos, a közös nevező,

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a 10 és a 6 
közös többszörösének kell lennie.

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Mi a közös többszöröse
a 10-nek és a 6-nak?

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Általában az a legegyszerűbb,
ha a legkisebb közös többszöröst találjuk meg,

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és erre jó módszer,
ha elindulunk a nagyobb nevezővel

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ami itt 10, és azt mondjuk,
akkor 10 osztható 6-tal?

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Nem. Jó, akkor 20 
osztható 6-tal?

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Nem, 30 ostható 6-tal?
Igen, 30 ostható 6-tal.

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Csak megyek végig a 10 
többszörösein,

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és azt mondom, hogy 
"Vajon mennyi a 10 legkisebb többszöröse,

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ami osztható 6-tal?"
És az 30 lesz.

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Tehát át tudom írni 
mindkét törtet

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valami/30-ra.

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Vegyük a 9/10-det. 
Hogy tudom átírni,

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mint valami/30?

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Megszorzom
a nevezőt 3-mal.

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