0
Ntawm no, Dab tsi yog qhov tsis zoo 0.4 raws li ib feem? Tus decimal 0.4 yog sib npaug rau feem 2/5.
Koj yuav sau 0.4545 li ib feem twg? 1 teb
- x = 0.454545..
- multiply 100:
- 100 x = 45.454545...
- subtractx:
- 99x = 45.4545.. − 0.4545..
- = 45.
- faib 99:.
- x = 4599.
Tsis tas li ntawd Puas yog .45 rov hais dua los yog tsis muaj tseeb? Repeating decimals yog xam tus lej muaj kuab vim tias lawv tuaj yeem sawv cev raws li qhov sib piv ntawm ob tus lej sib npaug.
Puas yog 0.45 tus lej xaj puas yog? Yog, vim hais tias lub ntsiab lus ntawm tus lej rational yog ib qho uas tuaj yeem qhia los ntawm ib feem lossis tus lej kawg.
0.4 zoo li cas?
Yuav ua li cas koj tig .4 mus rau hauv ib feem? Yog li yog tias koj xav tig tag nrho tus lej plaub rau hauv ib feem, koj yuav pib los ntawm kev xa nws mus rau feem 4/1.
Dab tsi yog 0.4 Rov ua dua ib feem? Teb: 0.4 rov ua dua ib feem tuaj yeem sau ua 4/9 hauv feem.
Dab tsi yog 83.33 yog ib feem?
Feem pua rau Fraction Table
Feem Pua | Feem |
---|---|
77.78% | 79 |
80% | 45 |
83.33% | 56 |
85.71% | 67 |
Thiab Yuav ua li cas koj tig 45.45 rau hauv ib feem? Cov kauj ruam los hloov decimal rau hauv feem
- Sau 45.45 as 45.451.
- Luas = 45.45 x 1001 x 100 = 4545100.
- 90920.
Tus nqi feem ntawm 42.85 feem pua yog dab tsi?
Fractions rau feem pua
1 | 3 | |
---|---|---|
6 | 16.66 | 50 |
7 | 14.28 | 42.85 |
8 | 12.5 | 37.5 |
9 | 11.11 | 33.33 |
Dab tsi yog 0.36 rov ua dua ib feem? opaque=0.36363636 tsi. . . yog sau ua feem 411 .
Koj yuav sau 0.16 li ib feem twg?
Teb: 0.16 raws li ib feem ntawm nws daim ntawv yooj yim tshaj plaws yog 4/25.
Puas yog 0.45 tus lej?
0.45, 5/2, -0.726495…, 18, thiab -65 1/4 yog txhua tus lej tiag. … Piv txwv li, -7 yog tus lej, yog li nws kuj yog ib qho laj thawj thiab tus lej tiag. Lub hauv paus square ntawm 2 yog tus lej irrational, yog li nws kuj yog tus lej tiag.
Puas yog tus lej irrational? Thaum tus lej irrational yog nthuav nyob rau hauv daim ntawv decimal, nws yog a uas tsis yog qhov kawg decimal uas tsis rov ua dua . Nco ntsoov tias tus lej tsis raug txiav tawm uas rov ua dua yog tus lej sib npaug, tsis yog tus lej tsis sib haum.
...
Cov lej tsis sib xws.
π | = | 3.14159 ... |
---|---|---|
e | = | 2.71828 ... |
= | 1.41421 ... |
Is
Yuav ua li cas koj tig 0.16 mus ua feem me me?
Teb: 0.16 raws li ib feem ntawm nws daim ntawv yooj yim tshaj plaws yog 4/25.
Yuav ua li cas koj sau 0.5 raws li ib feem? Teb: 0.5 raws li ib feem yog sau li 1/2.
Yuav ua li cas koj tig 0.2 mus ua feem me me?
Ua ntej, sau 0.2 raws li ib feem, peb hloov decimal rau feem. Rau qhov ntawd, peb faib tus lej los ntawm 1 thiab muab cov saum toj thiab hauv qab los ntawm 10. Yog li, 0.2/1 × 10/10 = 2/10, uas tuaj yeem txo qis ntxiv mus. 1/5. Qhov no txhais tau tias 0.2 raws li ib feem yog sib npaug rau 1/5.
Koj yuav sau 3 li ib feem twg?
Koj ua 1/3 rau tag nrho tus lej li cas?
1/3 = 0.33333333 nrog 3 kom rov ua dua. Yog tias koj xav hloov nws mus rau tus lej ze tshaj plaws, nws yog 0.
Yuav ua li cas koj tig mus rau hauv ib feem? Txhawm rau hloov tus lej rau hauv ib feem, koj muab cov lej mus rau sab xis ntawm tus lej lej hauv tus lej (sab saum toj ntawm kab lus). Tom ntej no, koj tso tus lej 1 rau hauv tus lej, thiab tom qab ntawd ntxiv ntau tus lej raws li tus lej muaj lej. Txo cov feem ntau yog tias xav tau.