Mua ob ntu ntawm txhua feem los ntawm tus lej ntawm lwm feem, yog tias tus lej sib txawv. Piv txwv li, yog tias koj ntxiv 1/3 thiab 2/5, muab ob qho tib si 1 thiab 3 los ntawm 5, ua cov feem 5/15. Tom qab ntawd muab ob qho tib si 2 thiab 5 los ntawm 3 (tus denominator ntawm lwm feem), ua tus feem 6/15.
Kuv yuav ua cov feem zoo li cas?
Yuav kom pom cov feem sib npaug rau ib feem ntawm qhov muab, muab tus lej thiab tus lej los ntawm tib tus lej Piv txwv li, txhawm rau nrhiav qhov sib npaug ntawm 3/4, muab cov lej sib npaug. tus lej 3 thiab tus denominator 4 los ntawm tib tus lej, hais, 2. Yog li, 6/8 yog ib feem sib npaug ntawm 3/4.
Dab tsi zoo ib yam thiab tsis sib xws?
Similar (Like) feem yog feem nrog tib tus lej. Ntawm qhov tod tes, dissimilar (Unlike) fractions yog fractions with different denominators. Fractions nrog tib denominators (cov lej hauv qab).
Dab tsi yog 3 kauj ruam hauv kev ntxiv thiab rho cov feem sib txawv?
Kauj Ruam 1: Nrhiav qhov qis tshaj plaws Common Ntau (LCM) ntawm cov denominators. Kauj Ruam 2: Muab cov lej thiab tus lej ntawm txhua feem los ntawm tus lej kom lawv muaj LCM ua lawv tus lej tshiab. Kauj Ruam 3: Ntxiv lossis rho cov lej thiab khaws tus lej tib yam
Dab tsi yog qhov zoo?
Ib feem zoo yog ib feem uas nws tus lej me dua nws tus lej. Ib feem tsis tsim nyog yog ib feem uas nws tus lej sib npaug los yog ntau dua nws tus lej. 3/4, 2/11, thiab 7/19 yog cov feem tsim nyog, thaum 5/2, 8/5, thiab 12/11 yog cov feem tsis tsim nyog.
