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Video: Yuav ua li cas koj piav ib decimal rau ib feem?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Hloov ua lwm yam Decimals rau Fractions
- Kauj Ruam 1: Sau cov ntawv zauv faib los ntawm 1, zoo li no: zauv 1.
- Kauj ruam 2: Muab ob sab saum toj thiab hauv qab los ntawm 10 rau txhua tus lej tom qab zauv taw tes. (Piv txwv li, yog tias muaj ob tus lej tom qab zauv point, ces siv 100, yog tias muaj peb ces siv 1000, thiab lwm yam.)
- Kauj ruam 3: Simplify (los yog txo) lub feem .
Ntxiv rau qhov no, dab tsi yog qhov feem pua ntawm cov lej hauv daim ntawv yooj yim?
Decimal rau feem kev hloov dua siab tshiab feem ntau yog ob-kauj ruam ua haujlwm. Ua ntej, hloov cov zauv rau feem siv kaum, pua, txhiab, thiab lwm yam nyob ntawm tus naj npawb ntawm zauv qhov chaw.
Ua kom yooj yim feem : siv tej yam.
| Qhov feem pua yog dab tsi? | 64 100 |
|---|---|
| Sau cov feem hauv daim ntawv yooj yim tshaj plaws | 16 25 |
Ib yam li ntawd, koj txhais li cas los ntawm tus zauv feem? Cov zauv feem . mas A feem qhov twg tus denominator (tus lej hauv qab) yog lub zog ntawm kaum (xws li 10, 100, 1000, thiab lwm yam). Koj ua tau sau cov zauv feem nrog a zauv point (thiab tsis muaj denominator), uas ua rau nws yooj yim dua ua xam xws li ntxiv thiab muab sib npaug rau feem.
Ua raws li qhov no saib, koj piav qhia tus lej lej li cas?
Feem ntau peb tham txog tus lej thaum twg zauv suav a zauv taw tes rau sawv cev tag nrho tus lej ntxiv ib feem ntawm tag nrho tus lej (teev, hundredths, thiab lwm yam). A zauv point yog point lossis dot siv los cais tag nrho ib feem ntawm a tus lej los ntawm fractional ib feem ntawm a tus lej.
Dab tsi yog 0.25 raws li ib feem?
Tus lej 0.25 sawv cev rau feem 25/100 ib. Decimal feem ib txwm muaj tus denominator raws li lub zog ntawm 10. Peb paub tias 5/10 yog sib npaug rau 1/2 txij thaum 1/2 zaug 5/5 yog 5/10. Yog li ntawd, tus lej 0.5 yog sib npaug rau 1/2 lossis 2/4, thiab lwm yam.
Pom zoo:
Yuav ua li cas koj tig cov feem rau hauv cov zauv thiab feem pua?
Ob kauj ruam los hloov ib feem rau ib feem pua Hloov cov feem mus rau tus lej zauv.Cov feem bar ntawm tus lej sab saum toj (tus lej) thiab tus lej hauv qab (tus lej) txhais tau tias ' faib los ntawm.' Muab los ntawm 100 los hloov tus lej lej topercent. Luas = 0.25 × 100 = 25%
Yuav ua li cas koj hloov 67.5 mus rau ib feem?
Kauj ruam los ntawm kauj ruam daws 67.5/100 = (67.5 x 10)/(100 x 10) = 675/1000. Kauj Ruam 3: Ua kom yooj yim (lossis txo) cov feem saum toj no los ntawm kev faib cov lej thiab tus lej los ntawm GCD (Greatest Common Divisor) ntawm lawv. Hauv qhov no, GCD(675,1000) = 25
Lub hauv paus ntsiab lus twg piav qhia tias vim li cas AFC poob qis thaum cov zis nce ntxiv cov ntsiab lus piav qhia vim li cas AVC nce ntxiv thaum cov zis nce ntxiv?
AFC poob qis vim qhov tso zis ntau ntxiv vim muaj kev sib kis. Tus nqi ruaj khov yog kis mus rau ntau dua thiab ntau dua units ntawm cov khoom tso tawm raws li cov zis ntau ntxiv. AVC nce raws li cov zis nce vim qhov txo qis rov qab los. Vim qhov txo qis rov qab mus rau kev ua haujlwm, nws raug nqi ntau dua los tsim txhua chav ntxiv ntawm cov zis
Yuav ua li cas decimals cuam tshuam rau feem feem?
Decimals tuaj yeem sau rau hauv daim ntawv feem. Txhawm rau hloov tus lej lej mus rau ib feem, tso tus lej lej ntawm nws qhov chaw tus nqi. Piv txwv li, nyob rau hauv 0.6, lub rau yog nyob rau hauv lub thib kaum qhov chaw, yog li peb tso 6 tshaj 10 los tsim qhov sib npaug feem, 6/10. Yog xav tau, simplify cov feem
Yuav ua li cas koj hloov ib feem tsis tsim nyog rau ib feem sib xyaw?
Txhawm rau hloov cov feem tsis raug mus rau ib feem sib xyaw, ua raws li cov kauj ruam no: Faib tus lej los ntawm tus denominator. Sau tag nrho cov lus teb. Tom qab ntawd sau ib yam dab tsi ntxiv rau saum tus denominator