Regla de tres

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 PKAHB FK VPKY 2) COVPNF[IICÙO.-  JBAOCV[FKY \PN\NPICNOBHKY 2.2) JBAOCV[FKY FCPKIVBJKOVK \PN\NPICNOBHKY.- Fns jbaoctufks (prnpckfbf eêscib quk pukfk skr jkfcfb) sno fcrkitbjkotk prnpnricnobhks (F\) iubofn bh bujkotbr n fcsjcoucr kh vbhnr fk uob fk khhbs, kotnoiks kh vbhnr inrrkspnofckotk b hb ntrb buj kotbrâ n fcsj c oucrâ rkspk itcv bjk otk ko h b jc sjb p rnpn ricùo. Kdkj phn4 [ob pkrs nob rkin rrk 6< j ktrns ko ; skauo fns. (Kspbicn vs. Vc kjpn) Jbaoc tuf Ubh nrks inrrk spnofckotks B4 Kspbic n (j ktrns) 6< =< 20< 25< 0<< @4 Vc kjpn (skauo fns ) ; 2< 2; 0< 0; Bh fcvcfcr sus vbhnrks inrrkspnofckotks kh inickotk ks sckjprk inostbotk, ks fkicr, sc fns jbaoctufks B y @ sno fcrkitbjkotk prnpnricnobhks, sk fkontb4 B (F\) @ n B  @, kotnoiks  G  @  B  2.0) JBAOCV[FKY COUKPYBJKOVK \PN\NPICNOBHKY.-  Fns jbaoctufks sno covkrsbjkotk prnpnricnobhks (C\) iubofn bh bujkotbr n fcsjcoucr kh vbhnr fk uob fk khhbs kotnoiks kh v bhnr fk h b ntrb fcsj coucrâ n buj kotbrâ rksp kitcv bjk otk ko h b jc sjb prnp nricùo. Kdkj phn4 [ob pkr snob rkinrrk 25< gj (Ukhnic fbf vs. V c kjpn) Jbaoc tuf Ubh nrks inrrkspnofckotks B4 Ukh nicfbf (gj/m ) ; 2< 0< 6< =< @4 Vc kjpn (m) 90 25 = 6 0 Bh juhtcphcibr sus vbhnrks inrrkspnofckotks kh prnfuitn ks sckjprk inostbotk, ks fkicr,  sc fns jbaoctufks B y @ sno covkrsbjkotk prnpnricnobhks, sk fkontb4 B (C\) @ n B  2  @, kotnoiks B @: G Ontb4 Yc cotkrvckoko 9 n jâs jbaoctufks tnfbs khhbs hbs pnfkjns inhnibr ko uob jcsjb kxprkscùo. Kdkjphn 4 Yc B  @ y B  2  I, sk pukfk kxprksbr bsê4  G  @ I  B  

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Se presenta ejemplos ilustrativos resueltos en forma didáctica y recreativa

Transcript of Regla de tres

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WAIFK EA UWA]

;) HJUWBEQMMHÝJ.- DKIJHUQEA] SWBSBWMHBJKFA]

;.;) DKIJHUQEA] EHWAMUKDAJUA SWBSBWMHBJKFA].- Ebs dkijhtueas(prbphaeke `äshmk qua puaea sar daehek) sbj ehramtkdajta prbpbrmhbjkfas (ES) mukjeb kf

kudajtkr b ehsdhjuhr af vkfbr ea ujk ea affks, ajtbjmas af vkfbr mbrraspbjehajta k fk btrkkudajtkrë b ehsdhjuhrë raspamthvkdajta aj fk dhsdk prbpbrmhýj.

Anadpfb> Qjk parsbjk rambrra 53 datrbs aj 1 saiujebs. (Aspkmhb vs. Uhadpb)

Dkijhtue Pkfbras mbrraspbjehajtasK> Aspkmhb (datrbs) 53 <3 ;73 ;03 733G> Uhadpb (saiujebs) 1 ;3 ;1 73 71

Kf ehvhehr sus vkfbras mbrraspbjehajtas af mbmhajta as shadpra mbjstkjta, as eamhr, sh ebsdkijhtueas K y G sbj ehramtkdajta prbpbrmhbjkfas, sa eajbtk> K (ES) G b K   G, ajtbjmas

 O  G

 K  

;.7) DKIJHUQEA] HJPAW]KDAJUA SWBSBWMHBJKFA].-  Ebs dkijhtueas sbjhjvarskdajta prbpbrmhbjkfas (HS) mukjeb kf kudajtkr b ehsdhjuhr af vkfbr ea ujk ea affks ajtbjmasaf vkfbr ea fk btrk ehsdhjuhrë b kudajtkrë raspamthvkdajta aj fk dhsdk prbpbrmhýj.

Anadpfb> Qjk parsbjk rambrra ;03 od (Pafbmheke vs. Uhadpb)

Dkijhtue Pkfbras mbrraspbjehajtasK> Pafbmheke (od/l) 1 ;3 73 53 <3G> Uhadpb (l) =7 ;0 < 5 7

Kf dufthpfhmkr sus vkfbras mbrraspbjehajtas af prbeumtb as shadpra mbjstkjta, as eamhr,   sh ebs

dkijhtueas K y G sbj hjvarskdajta prbpbrmhbjkfas, sa eajbtk> K (HS) G b K 

;  G, ajtbjmas

KG4 O

Jbtk>  ]h hjtarvhajaj = b dës dkijhtueas tbeks affks fks pbeadbs mbfbmkr aj ujk dhsdk axprashýj.

Anadpfb> ]h K  G y K 

; M, sa puaea axpraskr ksä>  O 

 G

M  K

 

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7) WAIFK EA UWA] ]HDSFA EHWAMUK

Mbjshsta aj qua ekebs = vkfbras mbrraspbjehajtas k 7 ebs dkijhtueas ehramtkdajta prbpbrmhbjkfassa eaga ajmbjtrkr uj mukrtb vkfbr.

Anadpfb>  Qj mhmfhstk rambrra ;7 od aj ;0 dhjutbs. ²[uè ehstkjmhk rambrrarë aj ujk lbrk2

]bfumhýj>  K dkybr aspkmhb rambrrheb adpfakrë dkybr thadpb, ajtbjmas af aspkmhb y thadpb sbjdkijhtueas ehramtkdajta prbpbrmhbjkfas

Dkijhtue Pkfbrasmbrraspbjehajtas

K> Aspkmhb (od) ;7 x

G> Uhadpb (dhj) ;0 03

k) Sfkjtab> 

;7 od ;0 dhj

\ 03 dhj

g) Waifk> Dufthpfhmkjeb aj Kspk (Dètbeb> Kspk)

x ∘ ;0 dhj 4 ;7 od ∘ 03 dhj 

x 4;7 od ∘ 03 dhj

;0 dhj4 51 od 

m) Mbdprbgkmhýj> ]h K G, ajtbjmas>

K

G4 O ⇗

 

4 ⇗;7

;04

03 

Wadpfkzkjeb fk raspuastk bgtajhek>

;7

;0 4

51

03 ⇗

=

5 4

=

5 Fb qua sa quaräk mbdprbgkr

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=) WAIFK EA = ]HDSFA HJPAW]K

Mbjshsta aj qua ekebs = vkfbras mbrraspbjehajtas k 7 dkijhtueas hjvarskdajta prbpbrmhbjkfas saeaga ajmbjtrkr uj mukrtb vkfbr. 

Anadpfb>  = bgrarbs puaeaj lkmar ujk bgrk aj 75 eäks ²Aj muëjtb thadpb lkrëj fk dhsdk bgrk 7bgrarbs2

]bfumhýj>  Mbj dajbs bgrarbs fk bgrk sa mbjstruhrë aj dës eäks, ajtbjmas af jþdarb ea bgrarbs yaf thadpb sbj dkijhtueas hjvarskdajta prbpbrmhbjkfas.

Dkijhtue Pkfbrasmbrraspbjehajtas

K> Bgrarbs = 7G> Uhadpb (eäks) 75 x

k) Sfkjtab> Mbdb ; lbrk 4 03 dhjutbs

= bgrarbs 75 eäks

7 bgrarbs x

g) Waifk> Dufthpfhmkjeb aj Skrkfafb (Dètbeb> Skrkfafks)

= bgrarbs  75 eäks 4 7 bgrarbs  x

x 4= bgrarbs ∘ 75 eäks

7 bgrarbs4 =0 eäks 

m) Mbdprbgkmhýj>

⇗ ∘ 4 ⇗ ∘ 4 ∘ 4  

∘ 4  

Wadpfkzkjeb af vkfbr mkfmufkeb>= ∘ 75 4 7 ∘ =0 ⇗ 97 4 97 Fb qua sa quaräk mbdprbgkr.

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5) WAIFK EA UWA] MBDSQA]UK

As kquaffk aj fk qua fks dkijhtueas qua sa mbdpkrkj sbj = b dës.

Dètbeb ea fks Wkyks> Fk raifk ea = mbdpuastk thaja = pkrtas>

k) Mkusk> Wakfhzkebras ea fk bgrk b kmmhýj y sus mbjehmhbjas

g) Mhrmujstkjmhk>  Dkijhtueas rafkmhbjkeks mbj af thadpb

m) A`amtb> Fb rakfhzkeb, fk bgrk, sus daeheks, su eh hmuftke

Anadpfb> Skrk lkmar ujk zkjnk ea =3 datrbs ea fkrib pbr ;3 ea kjmlb, ;1 bgrarbs lkj trkgknkeb 0eäks k rkzýj ea ;7 lbrks ehkrhks. ²Muëjtbs eäks trkgknkrëj ;< bgrarbs k 8 lbrks ehkrhks aj lkmar ujkzkjnk ea 51 datrbs ea fkrib pbr 73 ea kjmlb2

]bfumhýj> K dës bgrarbs (K) fk bgrk sa lkrë aj dajbs eäks (G), pbr fb tkjtb K 

; G. K dajbs

lbrks ehkrhks ea trkgknb (M) fk bgrk sa lkrë aj dës eäks (G), pbr fb tkjtb G 

;M. K dës datrbs ea

fkrib (E) fk bgrk sa lkrë aj dës eäks (G), pbr fb tkjtb G  E. X k dës datrbs ea kjmlb (A)

Fk bgrk sa lkrë aj dës thadpb, pbr fb tkjtb G A.

Dkijhtue Pkfbrasmbrraspbjehajtas

K> Bgrarbs ;1 ;<G> Uhadpb (eäks) 0 x

M> Uhadpb (lbrks ehkrhks) ;7 8E> Datrbs ea fkrib =3 51A> Datrbs ea kjmlb ;3 73

k) Sfkjtab>

Mkusk Mhrmujstkjmhk A`amtbBgrarbs Eäks Lbrks ehkrhks Fkrib Kjmlb

;1;<

0x

;78

=3 ;351 73

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g) Waifk> Dètbeb ea fks rkyks

;< ∘ x ∘ 8 ∘ =3 ∘ ;3 4 ;1 ∘ 0 ∘ ;7 ∘ 51 ∘ 73 ⇗ x 4; 1 ∘ 0 ∘ ; 7 ∘ 5 1 ∘ 7 3

; < ∘ 8 ∘ = 3 ∘ ; 34 73 eäks 

m) Mbdprbgkmhýj>  Ea kmuareb k fbs ektbs sa thaja qua>

 

4 ⇗

  ∘ ∘

4  ∘ ∘

4  

; 1 ∘ 0 ∘ ; 7

=3 ∘ ;34

; < ∘ ∘ 8

51 ∘ 73⇗

;<

14

;<

Ukf mbdb sa quaräk mbdprbgkr.

1) DH]MAFËJAK EA SWBGFADK]

Jbtk> Fbs prbgfadks qua sa prasajtkj k mbjthjukmhýj jb lkj sheb rasuaftbs aj af ;33%, pbr fb quafk sbfumhýj mbdpfatk quaek mbdb tkrak pkrk ustaeas asthdkebs famtbras.

;) Gartlk Hgunès, ujk kdk ea mksk, fkvk pbr mkek =7 dhjutbs ;3 pkjtkfbjas. ²Muëjtbs pkjtkfbjasfkvkrë aj ;l 73 dhjutbs2

x ∘ =7 dhj 4 ;3 pkjtkfbjas ∘ <3 dhj ⇗ x 4;3 pkjtkfbjas ∘ <3 dhj

=7 dhj4 71 pkjtkfbjas 

7) ;3 bgrarbs puaeaj lkmar ujk bgrk aj 75 eäks ²Aj muëjtb thadpb lkrëj fk dhsdk bgrk < bgrarbs2

Bgrarbs Eäks;3 75

< x

x ∘ < bgrarbs 4 ;3 bgrarbs∘ 75 eäks ⇗ x 4;3 bgrarbs ∘ 75 eäks

< bgrarbs4 =3 eäks 

Skjtkfbjas Uhadpb;3 =7 dhj

x <3 dhj

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=) 0 mkgkffbs thajaj rkmhýj pkrk ;1 eäks, sh sa kudajtkj = mkgkffbs dës. ²Skrk muëjtbs eäks kfmkjzkrëfk rkmhýj kjtarhbr2

x ∘ 8 mkgkffbs 4 0 mkgkffbs ∘ ;1 eäks ⇗ x 40 mkgkffbs ∘ ;1 eäks

8 mkgkffbs4 ;3 eäks 

5) Dkrhb ]uëraz trkgknk aj uj mbfaihb ea 933 astuehkjtas, aj af muëf raprbgkrbj af kûb af 1%.²Muëjtbs astuehkjtas jb `uarbj prbdbvhebs aj af mbfaihb ea Dkrhb2

Astuehkjtas Sbrmajtkna933 ;33%

x 1%

x ∘ ;33% 4 933 astuehkjtas ∘ 1% ⇗ x 4933 astuehkjtas ∘ 1%

;33%4 =1 

1) ²Eykjhtk Whvark fa praiujtk k su lhnk Adhfy ]uëraz ²Ea què mkjtheke as $ 873 af 73 %2. ²Muëfas fk raspuastk2

x ∘ 73% 4 $ 873 ∘ ;33% ⇗ x 4$ 873 ∘ ;33%

73%4 $ 5033 

0) Aj uj ajirkjkna, af phûýj dkybr thaja 53 ehajtas y af dajbr thaja 71 ehajtas. ]h af phûýj dkybrek 733 vuaftks. ²Muëjtks vuaftks ek af dajbr2

x ∘ 71 ehajtas 4 53 ehajtas ∘ 733 vuaftks ⇗ x 453 ehajtas ∘ 733 vuaftks

71 ehajtas4 =73 vuaftks 

Mkgkffbs Eäks0 ;1

8 x

Mkjtheke Sbrmajtknax ;33%

873 73%

Ehajtas Puaftks53 733

71 x

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9) Qjk iukrjhmhýj ea ;=33 lbdgras thajaj vävaras pkrk ;73 eäks. ]h sa easak qua fbs vävaras euraj;3 eäks dës. ²Muëjtbs lbdgras lkgräk qua rathrkr ea fk iukrjhmhýj2

Lbdgras Eäks;=33 ;73

x ;=3

x ∘ ;=3 eäks 4 ;=33 lbdgras∘ ;73 eäks ⇗ x 4;=33 lbdgras ∘ ;73 eäks

;=3 eäks4 ;733 lbdgras 

;=33 lbdgras  ”  ;733 lbdgras 4 ;33 lbdgras

<) K uj paýj sa fa b`rama uj suafeb ea $ ;833 kjukfas y uj mkgkffb. Kf mkgb ea < dasas as easpaeheb

ramhghajeb uj tbtkf ea $ ;733 y af mkgkffb. ²Muëf as af vkfbr eaf mkgkffb2m 4 mkgkffb

]uafeb Dasas;833 + m ;7

;733 + m <

< ∘ ($;833+m) 4 ;7 ∘ ($;733 + m) ⇗ $;1733 + <m 4 $;5533 + ;7m 

$;1733 ∗ $;5533 4 ;7m ∗ <m ⇗ $<33 4 5m ⇗ m 4

$<33

5 ⇗ 4 $733 

8) ]aiujeb ]uëraz, uj krtaskjb, pajsý lkmar 73 `hiurks ea dkeark aj ;1 eäks, parb tkreý 0 eäksdës pbr trkgknkr 7 lbrks dajbs mkek eäk. ²Muëjtks lbrks trkgkný ehkrhkdajta2

; ∘ ; 1 ∘ ∘ 7 3 4 ; ∘ 7 ; ∘ ( ∗ 7) ∘ 73 ⇗ =33 4 573 ∗ <53 

<53 4 573 ∗ =33 ⇗ <53 4 ;73 ⇗ 4<53

;73⇗ 4 9 

> ∗ 7 4 9 ∗ 7 4 1 

Mkusk Mhrmujstkjmhk A amtbKrtaskjb Eäks Lbrks ehkrhks @hiurks

;;

;17;

xx-7

7373

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;3) Dktläks ]uëraz mbjtrktk k 75 bgrarbs, fbs mukfas sa mbdprbdataj k mkvkr ujk zkjnk ea 13 d eafkrib, <d ea kjmlb y 7 d ea prb`ujeheke aj ;3 eäks. Dktläks eamhea kudajtkr tbeks fksehdajshbjas ea fk zkjnk aj uj 13%. ²Muëjtbs bgrarbs sa jamashtkj pkrk tardhjkr af mbjtrktb aj fkdhtke eaf pfkzb `hnkeb sh kudajtkj su a`hmhajmhk aj uj 13%2

Mkusk Mhrmujstkjmhk A amtbBgrarbs Eäks A hmhajmhk Fkrib Kjmlb Srb`ujeheke

75x

;31

;;,1

13 < 791 ;7 =

∘ 1 ∘ ;,1 ∘ 13 ∘ < ∘ 7 4 75 ∘ ;3 ∘ ; ∘ 91 ∘ ;7 ∘ = ⇗ 47 5 ∘ ; 3 ∘ ; ∘ 9 1 ∘ ; 7 ∘ =

1 ∘ ; , 1 ∘ 1 3 ∘ < ∘ 74 ;3< 

WA@AWAJMHK] GHGFHBIWË@HMK]

KXKFK, Brfkjeb, (7330), Dktadëthmk Wamrakthvk, D & P IWË@HM. Hgkrrk, Amukebr]QËWA^, Dkrhb

]QËWA^, Dkrhb, (7335), Hjtarkprajehzkna Lbfästhmb ea Dktadëthmk, Ae. Irë`hmks Sfkjatk,Hgkrrk, Amukebr.

]QËWA^, Dkrhb, (7335), Lkmhk uj Hjtarkprajehzkna Lbfästhmb ea Ëfiagrk y Iabdaträk, Ae.Irë`hmks Sfkjatk, Hgkrrk, Amukebr.

Fhgrbs y krtämufbs sbgra Krhtdèthmk, Ëfiagrk, Iabdaträk, Urhibjbdaträk, Fýihmk Dktadëthmk,Srbgkghfhekeas, Astkeästhmk Easmrhpthvk, Astkeästhmk Hj`arajmhkf, Mëfmufb Eh arajmhkf, MëfmufbHjtairkf, y Sfkjh`hmkmhbjas Eheëmthmks sa ajmuajtrkj pugfhmkebs aj>lttp>//as.smrhge.mbd/dkrhbsukrazhgunas  lttp>//www.dbjbirk`hks.mbd/usukrhb/par`hfas/dkrhbRsukrazR9/dbjbirk`hkslttp>//rapbshtbrhb.utj.aeu.am/lkjefa/;7=5109<8/903  

lttp>//www.ebmajtashjjbvkebras.jat/Qsukrhbs/Par/7818; lttp>//krthmufbsdktadkthmk.gfbispbt.mbd