15/17 yog qhov sib txawv ntawm 17/15.
Ib yam li ntawd, qhov sib cuam tshuam ntawm 4/9 yog ib feem? Piv txwv
1. | |
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Nrhiav kev sib raug zoo ntawm 49. | Qhov sib txawv ntawm 49 yog 94 . |
Kos rau: | |
Muab tus lej thiab nws qhov sib npaug. | 49⋅94 |
Ntau tus lej thiab tus lej. | 3636 |
Dab tsi yog qhov sib txawv ntawm 1 li ib feem? Kev piav qhia: Txhawm rau nrhiav qhov sib cuam tshuam ntawm ib feem, sib pauv tus lej thiab tus lej. Yog li, qhov sib npaug ntawm 2/1 yog 2.
Dab tsi yog qhov sib txuam ntawm rau? Yog li qhov sib txawv ntawm 6 yog 1/6 vim 6 = 6/1 thiab 1/6 yog inverse ntawm 6/1.
Secondly Dab tsi yog qhov sib txawv ntawm 1/8 raws li ib feem? Qhov sib txuam ntawm 1/8 yog pom los ntawm flipping cov feem: 1/8 flipped yog 8/1 lossis 8.
Dab tsi yog qhov sib txuam ntawm 1 2 3 li ib feem?
Qhov sib txawv ntawm qhov sib txawv ntawm 1 2/3 yog -3/5. Thawj kauj ruam hauv kev nrhiav qhov sib cuam tshuam ntawm 1 2/3 yog ua kom 1 2/3 rau hauv ib feem, uas yuav yog 5/3. ...
ces Dab tsi yog qhov sib npaug ntawm 3/5 ua ib feem? Kev piav qhia: Txhawm rau nrhiav qhov sib cuam tshuam ntawm ib feem, sib pauv tus lej thiab tus lej. Yog li, qhov sib npaug ntawm 3/5 yog 5/3.
Dab tsi yog qhov sib txawv ntawm 2 raws li ib feem? 7/2 = 3.5
Tswv yim: Raws li koj tuaj yeem tau txais los ntawm peb cov lus qhia saum toj no, koj tuaj yeem tau txais qhov sib npaug ntawm ib feem, xws li 2/7, los ntawm kev hloov tus lej thiab tus lej.
Dab tsi yog qhov sib txawv ntawm 7/10 raws li ib feem?
Nqe lus piav qhia: Lub reciprocal txhais tau tias tig rau saum thiab hauv qab. Qhov sib txuam ntawm 710 yog yooj yim 107 .
Dab tsi yog qhov sib txawv ntawm 4 los ntawm 5? Reciprocal ntawm 4/5 yog 5/4.
Dab tsi yog qhov sib npaug ntawm 5 feem?
5/8 = 1.6
Tswv yim: Raws li koj tuaj yeem tau txais los ntawm peb cov lus qhia saum toj no, koj tuaj yeem tau txais qhov sib npaug ntawm ib feem, xws li 5/8, los ntawm kev hloov tus lej thiab tus lej.
Dab tsi yog qhov sib txuam ntawm 5 raws li ib feem? Qhov sib txawv ntawm 7 yog 75 .
Dab tsi yog qhov sib txawv ntawm 1 raws li ib feem?
Teb thiab piav qhia: Qhov sib txuam ntawm 1/5 yog 5. Koj tuaj yeem ua pov thawj qhov no los ntawm kev sib faib 1/5 thiab 5.
Dab tsi yog qhov sib txawv ntawm 1/4 raws li ib feem?
Hloov cov zauv mus rau qhov sib npaug, piv txwv li, 0.25 = 1/4, thiab yog li ntawd, qhov sib npaug yog 4 / 1 = 4. Koj tuaj yeem siv tus lej suav los faib 1 los ntawm feem.
Dab tsi yog qhov sib txawv ntawm 3/4 raws li ib feem? Kev sib raug zoo ntawm 3/4 ≈ 1.333333333333
Tswv yim: Raws li koj tuaj yeem tau txais los ntawm peb cov lus qhia saum toj no, koj tuaj yeem tau txais qhov sib npaug ntawm ib feem, xws li 3/4, los ntawm kev hloov tus lej thiab tus lej.
Dab tsi yog qhov sib txawv ntawm 18 raws li ib feem? Piv txwv ntxiv:
Number | Reciprocal | Raws li Decimal |
---|---|---|
5 | 15 | = 0.2 |
8 | 18 | = 0.125 |
1000 | 11000 | = 0.001 |
Dab tsi yog qhov sib txawv ntawm 9 raws li ib feem?
Yog li, ntawm no peb hloov tus lej mus rau hauv daim ntawv upside-down. Piv txwv li, qhov sib txuam ntawm 9 yog 1 faib los ntawm 9, piv txwv li 1/9.
Dab tsi yog qhov sib npaug ntawm 7/8 raws li ib feem? Qhov sib txawv ntawm 78 yog 87 , uas yog 78 ntxeev kom tus lej ua tus…
Dab tsi yog qhov sib txawv ntawm 10 raws li ib feem?
Txhawm rau nrhiav qhov sib txuam ntawm 10/3, tig tus lej thiab tus lej. Qhov sib txawv = 3/10.
Dab tsi yog qhov sib txuam ntawm 2/3 4 li ib feem? Reciprocal (inverse multiplicative) ntawm 234 = 114 yog 411 .
Dab tsi yog qhov sib txawv ntawm 3?
Txhawm rau nrhiav qhov sib txuam ntawm 10/3, tig tus lej thiab tus lej. Qhov sib txawv = 3/10. Yog tias 4/7 ntawm tus lej x yog 84. Tus nqi ntawm x yog dab tsi?
Dab tsi yog qhov sib txawv ntawm 8? Piv txwv li, qhov sib txuam ntawm 8 yog 1 faib los ntawm 8, piv txwv li 1/8.