

Lineaarvõrrandite süsteemid. Asendusvõte
Presentation
•
Mathematics
•
8th Grade
•
Hard
Eliise Oss
Used 1+ times
FREE Resource
6 Slides • 7 Questions
1
Some text here about the topic of discussion
2
Some text here about the topic of discussion
Asendusvõte on lihtsalt ühe lineaarvõrrandi paigutamine teise sisse. Ühe tundmatu väärtus avaldatakse ühes reas ja asendatakse see teise ritta.
3
Multiple Choice
Mis on selles ülesandes y väärtus?
2
1
4
-2
4
Multiple Choice
Mis on selles ülesandes x'i väärtus?
3
1
x = 1 - 2y
x = 1 + 2y
5
Some text here about the topic of discussion
Selles näites on lihtne asendada.
Leiame 1 y väärtuse alumises reas.
Kuna meil on antud 4 y väärtus, peame me tervet rida jagama 4'ga, et leida 1 y väärtus.
Ja asendame selle ülemisse ritta.
Seejärel lahendame tekkinud lineaarvõrrandi.
6
Multiple Select
Mis on siin y väärtused?
y = 2x
y = 28 - 2x
y = 2
y = 0
7
Multiple Select
Mis on siin x väärtused?
x = 0,5y
x = 2y
x = 2
x = 14 - 0,5y
8
Poll
Kumma väärtusega (x või y) on sinu jaoks lihtsam edasi minna?
x väärtusega
y väärtusega
9
Some text here about the topic of discussion
Vali ise, kumb tundub lihtsam.
Selles näites on ülemises reas ühe x väärtus, mida on lihtne leida ja alumisse ritta asendada.
Samuti on alumises reas ühe y väärtus.
Vali ise rida, aga pea meeles, et see rida tuleb asendada teise ritta.
10
Open Ended
Pane kirja x või y väärtus lineaarvõrrandina.
11
Subject | Subject
Some text here about the topic of discussion
Leiame selles näites y väärtuse, sest alumises reas on väiksemad arvud.
y = 4x + 5
Asendame selle ülemisse ritta
x + 53 = -2 * (4x + 5)
Avame sulud ja viime x ühele poole, arvud teisele.
x + 8x = -10 - 53
9x = -63
Leiame x väärtuse
9x = -63 I: 9
x = -7
Asendame x jälle võrrandisse. Taaskord saad valida kummale reale asendada.
Ülemisse ritta tundub lihtsam, sest seal on juba ainult 1 x olemas. Ja leiame y väärtuse.
-7 + 53 = -2y
12
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Mis on y (lõplik) väärtus?
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13
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