Ib nrab ntawm 180 yog 90. Lwm txoj kev hais qhov no yog 180 / 2 = 90.
Ib yam li ntawd, koj piav li cas ib nrab ntawm tus lej rau tus menyuam?
Yuav ua li cas ib nrab ntawm 12? Ib nrab ntawm kaum ob tuaj yeem ua tau 6 kub 7 kub IIN :ua p. Txoj kev xav tseem ceeb! Hauv Roman tus lej, Kaum Ob yog XII. Yog tias koj coj ib nrab sab saum toj, nws yog VII…
24 cais ib nrab yog dab tsi? Ib nrab ntawm 24 yog 12.
Qhov thib ob yog dab tsi muaj ntawm 120? Ib nrab ntawm 120 yog 60.
Ib nrab tus lej yog dab tsi?
Ib nrab yog tib yam li cov feem ½. Qhov no txhais tau hais tias kom nrhiav tau ib nrab ntawm tus lej, peb tuaj yeem faib nws los ntawm 2. Txhawm rau faib los ntawm 2, faib tag nrho cov lej ua ob qhov sib npaug. Piv txwv li: ... Thiab koj mus, koj tau kawm yuav ua li cas rau ib nrab tus lej!
ces koj sau ib nrab ntawm cov lej li cas? Cov khoom ntawm halves
- Hauv cov lej lej, ib nrab yog qhia los ntawm 0.5.
- Peb tuaj yeem pom ib nrab ntawm tus lej muab nws los ntawm ½. Piv txwv li, nyob rau hauv daim duab, ib nrab ntawm cov pab pawg neeg ntawm 6 chips yog tau los ntawm 6 × 1 Tshaj 2 = 3.
Dab tsi yog 23 cais hauv ib nrab? Ib nrab ntawm 23 yog 11 1 / 2.
Ib nrab ntawm $50 yog dab tsi?
Ib nrab ntawm 50 sib npaug 25.
Ib nrab ntawm 5 yog dab tsi? Teb: Ib nrab ntawm 5 yog 5/2 raws li ib feem thiab 2.5 as a decimal.
Ib nrab ntawm 19 cm yog dab tsi?
Ib nrab ntawm 19 yog 9.5.
Yuav ua li cas yog ib nrab ntawm 38? coj 19 yog ib nrab ntawm 38 thiab 9.5 yog ib nrab ntawm 19. vam tias nws yuav pab tau koj !!
Tus naj npawb twg yog ib nrab ntawm 21?
Ib nrab ntawm 21 yog 10.5.
48 faib ib nrab yog dab tsi?
Siv lub laij lej, yog tias koj ntaus hauv 48 faib ua 2, koj yuav tau txais 24.
Ib nrab ntawm $18 yog dab tsi? Ib nrab ntawm 18 yuav dhau los 9.
Koj nrhiav tau ib nrab li cas?
1/2 hauv tus lej pes tsawg yog dab tsi?
Li no, 1/2 raws li tus lej tag nrho yuav yog 0 los yog 1.
Yuav ua li cas koj pom ib nrab ntawm tus lej ntawm lub tshuab xam zauv? Txhawm rau xam ib nrab ib feem pua ntawm lub tshuab xam zauv, koj muab tag nrho tus nqi los ntawm 0.5 ua raws li % khawm. Yog tias koj lub laij lej tsis muaj tus lej feem pua, koj muab tag nrho tus nqi los ntawm 0.005, uas yog tus lej ntawm ib nrab ib feem pua.
Koj sau ob ib nrab li cas?
Koj yuav hais tias "ob thiab ib nrab” Lwm hom ntawv yog ib feem tsis tsim nyog qhov twg tus lej yog ntau dua tus lej (5/2). Mathematicians yuav hais tias yog tsib halves. Koj yuav pom ob hom feem ntau hauv koj cov teeb meem. Ob qho piv txwv no sawv cev tus nqi tib yam (2 1/2 = 5/2).
Koj sau ib nrab li cas? Peb feem ntau sau nws li "ib nrabomitting "a" ua ntej nws. Ib tug thiab ib nrab txhais tau tias ib tug tag nrho thiab ib nrab ib nrab ua rau nws 1 ½ , (kab zauv daim ntawv yog 1.5 piv txwv li ib point tsib.)
Koj sau 3 thiab ib nrab li cas?
Ze li plaub xyoos. Peb thiab ib nrab xyoo (tsis muaj hyphens tshwj tsis yog tias nws yog ib qho lus hais—Ib xyoos thiab ib nrab xyoo kev nyuaj siab). Tsis txhob siv tus lej (3½ xyoo); Yog tias koj ua, koj yuav tsum tau kho txhua xyoo suav ua lej thoob plaws hauv kev tshaj tawm (1 xyoo, 5 xyoos, thiab lwm yam).
Ib nrab ntawm $37 yog dab tsi? Ib nrab ntawm 37 yog 18.5 los yog 18 1/2.
Dab tsi yog 7 hauv ib nrab?
Ib nrab ntawm 7 yuav 3 1 / 2, los yog hauv daim ntawv decimal, 3.5. Nrhiav 'ib nrab' ntawm tus lej yog tib yam li faib los ntawm 2.