Video: Yuav ua li cas koj thiaj paub yog cov feem sib npaug?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib txoj hauv kev yooj yim los saib seb yuav kuaj xyuas li cas equivalentfractions yog ua qhov hu ua "cross-multiply", uas txhais tau tias ntau tus lej ntawm ib qho feem los ntawm tus denominator ntawm lwm tus feem . Ces ua tib yam inreverse. Tam sim no sib piv ob lo lus teb kom pom yog lawv yog sib npaug.
Yog li ntawd, dab tsi yog ib feem sib npaug?
Hauv lej, sib npaug feem tuaj yeem txhais raws li ib feem nrog cov zauv sib txawv thiab cov denominators uas sawv cev tib tus nqi lossis feem ntawm tag nrho. Ntawm no yog ib qho piv txwv ntawm sib npaug feem.
Ib tug kuj yuav nug, dab tsi yog qhov sib npaug? Sib npaug fractions muaj ntau tus lej thiab tus lej, tab sis tus nqi tib yam. Yog tias koj muab faib los yog faib ib feem los ntawm ib feem ntawm daim ntawv 1 (piv txwv li: 2/2, 3/3, 4/4), cov feem tshiab yuav yog sib npaug mus rau qhov originalfraction.
Ib sab saum toj no, koj yuav qhia li cas yog cov feem loj lossis me dua?
Yog cov denominators yog tib yam, ces tus feem nrog rau ntau dua tus lej yog tus ntau dua . Cov feem nrog rau tsawg dua numeratoris cov tsawg dua feem . Thiab, raws li tau hais los saum no, yog thenumerators sib npaug, cov ib feem yog sib npaug. Siv los sib piv ob ib feem thiab.
Dab tsi yog sib npaug rau 3/5 Qhov feem?
Fractions sib npaug rau 1/2 yog 2/4, 3 /6, 4/8, 5 /10, 6/12 Fractions sib npaug rau 1/ 3 yog 2/6, 3 /9, 4/12, 5 /15, Fractions sib npaug rau 1/4 yog 2/8, 3 /12, 4/16, 5 /20,
Pom zoo:
Koj yuav ua li cas thiaj paub tias qhov sib npaug ua haujlwm lossis tsis yog?
Nws kuj yog ib qho yooj yim los txiav txim seb qhov sib npaug yog qhov ua haujlwm los ntawm kev daws rau y. Thaum koj muab ib qho kev sib npaug thiab tus nqi tshwj xeeb rau x, qhov yuav tsum tsuas yog ib qho sib txuas y-tus nqi rau qhov x-tus nqi.Txawm li cas los xij, y2 = x + 5 tsis yog qhov ua haujlwm; yog tias koj xav tias x = 4, ces y2 = 4 + 5 = 9
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