 Ngày soạn: Ngày dạy:    ! • "#$%&'($)*+, /0$123//4.*"'"564/$&*758$%&9"4* /$&*758$ • 91:2*/4.*'"564""%&+$* • 1",/"5);<+2)/+#7/$=//'"564+#/4.*"5%&+$*>/ "#?$*.//'"564?,-/9"/4.*@ ABACD EF !FGE  • F A=*?23/*")7>H=*'"$)@*"H&IIJI>KJKL@ • H=*"7JH$%H=*  !MNOPE )+4.*/$="5Q1 )+4.*/$=?& )+4.*R L !BMAG S>'"@ T R$466""'"564 U&7","&V ",:H&IR>KIL@/5$JH W $466""'"5 64 % /"$*(,-()*"'"564//$&* 758$(,-*?4Q66"//,& %- "$ "564&/,=U-"-U&'"564 U-"- ",:H&IR>JH@ @ 7 6 %& 10 11 / 10 11 7 6 1 7 6 1 10 11 <⇒        < >  H@ 17 5 − %& 7 2 Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 87  T F7&/"H0$123//4.* "'"564+:"./-=#$"./" %X($) T F"?H=*()*4#*0$ '"H#$/$= m ba m b m a + =+ >JHJ7∈Y7≠Z@ bd bcad bd bc bd ad d c b a + =+=+ >JHJ/J(∈YHJ(≠ Z@ T F[$123/?%58+, /'($)* +4%-//'"564/,=%&758$U& //64*$1\/"X"U&4.($* H&"471 / 7 2 17 5 0 7 2 0 17 5 < − ⇒        > < − T ]$4/4.*K'"564//$&* 758$64/4.*K,=64%-"$/& *,=*$1758$64 ]$4/4.*"'"5649"/758$ 64%"'"564//$&*758$J ?4Q/4.*",=64*,=*$1758$64 FX($) 5 6 5 42 5 4 5 2 = + =+  4 5 4 3 4 2 4 3 2 1 =+=+  )+4.*K  G^>RK'"@ F/"*"U)%X($)+:U51? H=* P$/5Q$U51"7R64%X($) 9"/?*+/'"5647&,=%& 758$U&//64*$1 T F[$//%X($)?H)& "23/U)0$123//4.*"'"564/ /$&*758$64F4#*0$ @FX($) 5 6 5 42 5 4 5 2 = + =+  3 1 3 12 3 1 3 2 − = +− =+ − 9 5 9 )7(2 9 7 9 2 9 7 9 2 − = −+ = − += − + '"H#$0$123/",L>K_@ H@[$123/L`K_a /@4#*0$ Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 88  F/"U&7 VR *.bUH=* U&7 F<7/"5);<*c%Q//'"564 18 6 %& 21 14 − ]"<<7U&7","& ?,-/9"",)/")'"<'/4.* ]7":1",)/")'"<'X" F/"$1?,-/9"",)/")'"<' X"0$6;<7//'"564 +:4*=/",$/",4*= ?$*.?4Q7-",)/") '"<'X" F/"U&7 VK `K_La F/"U&7H&IK/5$JH`Ka @ 25 8 25 7 − + − m ba m b m a + =+ >JHJ7∈d7≠Z@ R @ 1 8 8 8 5 8 3 ==+ K H@ 7 3 7 )4(1 7 4- 7 1 − = −+ =+ b 21 14- 18 6 + ]="'"564+Q$/",4*= ]?$*.'"564%Q4*= b 3 1 3 )2(1 3 2 3 1 21 14- 18 6 − = −+ = − +=+ 4.*K64*$1U&?,-&*" ' ?*/$=/4.*"'"564%c7.64 *$1+Q$+, /%(,-()*'"5 64/758$H2e*R FX($)T_Wbf 1 5 − W 1 3 f 1 35 +− f 1 2 − fTK R @ 25 )8(7 25 8 25 7 25 8 25 7 −+− = − + − = − + −  Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 89  H@ 6 5 6 1 − + F"$1?$*.90$=  5 3 25 15 − = − = K 3 2 6 4 6 )5(1 6 5 6 1 − = − = −+ = − + )+4.*b  LG^>RK'"@ ] $4/4.*"'"5649"4*/$&* 758$U&7"&V ] $40$1+4Q*758$64//'"564 U&7","&1V T F*"723//H,-/0$1+4Q* %&*/H=*+#"- T F/"%X($) 7 3 5 2 − + .+,*)/"4#$//"U&7 F/"/=U-'U&7 Vb 6$+*. bUH=* ] '"=0$1+4Q*758$64//'"564 "H#$U)0$123/0$1+4Q*758$ 64//'"564  35 15 35 14 7 3 5 2 − += − + b_ `a`_a f 35 1 35 )15(14 − = −+  Vb R @ 15 4 15 10 15 4 3 2 + − =+ − R_ `_a`Ra f 5 2 15 6 15 410 − = − = +−  K H@ 10 9 15 11 10 9 15 11 − += − + bZ `Ka`ba f 30 )27(22 30 27 30 22 −+ = − +  6 1 30 5 − = − =  b /@ 3 7 1 3 7 1 + − =+ −  f 7 20 7 21 7 1 =+ −  Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 90  F[$//%X($)?<7":1$ 0$1  23/ /4.*  "  '"5  64  9"4* /$&*758$64 F*.%&U'"H#$U) $=*/4F/"U&7H&IK/J (`Ka .KUH=* ] '"H#$",L`Ka R /@ 39 14 39 18 39 14 13 6 − += − + f 39 4 39 )14(18 = −+  K (@ )5()9( 9 2 5 4 18 4 5 4 18 4 5 4 − += − += − + f 45 26 45 )10(36 45 10 45 36 = −+ = − +  )+4.*I D>RK'"@ A&II>KL@ \Q(5$>`JaJf@%&4?4* @ 7 3 7 4 − + − gTR H@ 22 3 22 15 − + − g 11 8 − /@ 5 3 g 5 1 3 2 − + (@ 4 3 6 1 − + g 7 4 14 1 − + F1$/5Q$",)/")'"<'X"J ?$*.J66" F+,H=*?23/*")7>H=*'"$)@ *"H&I`Ka ";f 3 2 2 1 − + =*?h/$=; U&64&?*//646$>":15 +<&+=%&//*?h7&<7/".@ ")+4.*"<"7 L0$= @ 7 3 7 4 − + − fTR H@ 22 3 22 15 − + − ` 11 8 − /@ 5 3 a 5 1 3 2 − + (@ 4 3 6 1 − + ` 7 4 14 1 − + Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 91  @ 5 1 − YH@ 5 1 Y/@ 6 1 − (@ 6 1 Y<@ 6 7  /". 6 1 − P$/5Q$*="X/")6/". *?h;U& 6 1 − V )+4.*_ ijO^F!kG>K'"@ • ./"$4./0$123//4.*'"564 • "$1?$*.'"564>$/"#@?,-/9"U&7"2)/90$= A&5)'%Q"&A&IbJI_>KL@ A&_lJ_JZJRJbA`RKa Ngày soạn: Ngày dạy: lZ mP!  ! • H%5)($)*0$123//4.*"'"564/$&*758$%&9"4*/$&*758$ • 91:2*/4.*'"564""%&+$* • 1",/"5);<+2)/+#7/$=//'"564+#/4.*"5%&+$*>/ "#?$*.//'"564?,-/9"/4.*J?$*.90$=@ ABACD EF !FGE  • FKH=*'"$)*"H&K>H@A+#/"-?&/"- • H=*"7JH$%H=*  !MNOPE )+4.*/$="5Q1 )+4.*/$=?& )+4.*R L !BMAG S>'"@ L#7?R R $0$123//4.*"'"564/$&* 758$64F/4*",/4#*0$ K ",:H&5)'Ib>J(@JKL@ X"4#* R"H#$0$123/F/4*",/ 4#*0$J/=U-'"5);< K@",:H&5)' /@ 0 7 1 7 1 42 6 21 3 =+ − =+ − Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 92  /@ 42 6 21 3 + − (@ 21 15 24 18 − + − L#7?K R $  0$1  2/  /4.*  "  '"5  64 9"4*/$&*758$64 K ",:H&I_`KLa c7;H @;f 4 3 2 1 + − H@ 30 19 6 5 5 x − +=  (@ )4()7( 7 5 4 3 21 15 24 18 − + − = − + − Kl f 28 41 28 20 28 21 − = − + − K"H#$0$123/J/=U-'"5);< @;f 4 1 4 3 4 2 4 3 2 1 =+ − =+ − H@ 30 19 6 5 5 x − +=  30 19 30 25 5 x − +=  30 6 5 x =  5 1 5 x = ;fR )+4.*K mP!>Kl'"@ A&R 4.*//'"5646$ @ 5 2 6 1 + H@ 4 7 5 3 − + /@ 6 5 )2( − +− A&K >A&_A@4.*//'"564 @ 8 5 8 1 − + − .bUH=*U&7+4Q*"-&b/5$ JHJ/ R@ 30 17 30 12 30 5 5 2 6 1 )6()5( =+=+  KH@ 20 23 20 35 20 12 4 7 5 3 )5()4( − = − += − + b /@ 6 17 6 5 6 12 6 5 )2( − = − + − = − +− .bUH=*U&7+4Q*"-&b/5$ JHJ/ R@ 8 5 8 1 8 5 8 1 − + − = − + − Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 93  H@ 39 12 13 4 − + /@ 28 1 21 1 − + − [$H&&1U,$1?$*.9 0$=$+, / A&b >A&ZA@4.*//'"564 P$/5Q$+./+QH&%&"5);< ?,-/9"",)/")'"<'/4.* U&7"&VFc6V @ 58 16 29 3 + − H@ 45 36 40 8 − + /@ 27 15 18 8 − + − A&I >A&bA@+4 F*.K+./+QH&%&723+Q H& F* 1$U&7?*"c74.*-& 748*,-&U&7+, /751'"5Q/4* %)/V F  $  U&7  /"$*  R  *-&  /=  " *,-&/$&*U&76<:+, /H"$ /4*%)/ F.RUH=* ]7":1?c"H&1"&/"n"H&  4 3 8 6- − == KH@ 0 13 4 13 4 39 12 13 4 = − += − + b/@ 84 3 84 4 28 1 21 1 − + − = − + − 12 1 84 7- − == ]+./+QH&%&"5);< ]?,-/9"U&7'"<'/4.*?$ *.'"564+#+,%Q'"5644 *=%&9"0$1+4Q*758$6<:*. "-$+bUH=*U&7"< "5);< R@ 29 5 29 8 29 3 58 16 29 3 =+ − =+ − KH@ 5 3 5 4 5 1 45 36 40 8 − = − += − + b /@ 1 9 9 9 5 9 4 27 15 18 8 −= − = − + − = − + − +./+QH&J723+QH& 723$U&7?* *,-&","5U&775I*-& *,-&","U&775b*-& $U&7/"$*"c74.*-&U&7+, / H"$ R*-&/="*,-&/$&*U&7%)/ +, / 3 1 4 1 + /4*%)/ 4.U*=/&/=U,'U&7 %&%-= A&*= 4.*-&*,-&","5U&7+, / 4 1  /4*%)/ Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 94  A&_ >A&IA@ F/"")+4.*"7 F* 1"=c7+, ///'"564 b a 6/" 8 1 b a 7 1 − << − /,=H2e* Tb TA+4#//'"564 7 1 − %& 8 1 − +# /,=H2e*TbJ?4Qc7//'"564 b a F9#7?J/"+#7//"7U&7 H&4J?c"H&1?:?&* 4.*-&*,-&",K U&7+, /  3 1  /4*%)/ 4.*-&/="*,-&/$&*U&7+, / 12 7 12 4 12 3 3 1 4 1 =+=+ >/4*%)/@ +./+QH&%&'"5X/"+5Q$H&J? +4#?*"7 ")+4.*"7 24 3 8 1 ; 21 3 7 1 − = −− = − 24 3 8 1 24 3 22 3 21 3 7 1 − = − < − < − < − = − 4#*//'"564+U& 506 135 506 66 506 69 23 3 22 3 )22()23( − = − + − = − + − )+4.*b D>l'"@ ] F*."23/U)0$123/'"<' /4.*'"564/$&*758$%&9"4* /$&*758$ 4#  /",/  /"    o?&  /"-  X" ""oH&K>H@A\QH&*" 62p-=KH=*'"$)"K+4./"- *4Q774.+4.7%&74.+4.,: 48+4./,=_H)48H)+, / 0$1Q  +Q  9  0$=  %& R  4  ?4Q /"$1#H$/"*,-&'"<J"-& */"-?*%&*b'"$ L"//+4.'"5/4*;*F/" ")U)"+#//+4.H23+5Q$",)/ ") &/"n"H=*6$ 4.%&"23/U) /K'"$+#/,=%&'"5/4*JK+4. UH=*;'"<"&*(./ Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 95  W       − 12 1  2 1− 3 2 6 5 4 3 − TR 12 7 − 12 7 4 3 6 5 − 12 13− L"$/F/"/=U-'"5) ;<%&",-=*/"+4."23*/$4./ )+4.*I ijO^F!kG>K'"@ • ./"$4./0$123/ • A&5)'RJ_A`RKa • U)X"/"5/-H=/$='"<'"564*$1 • \./?,-/H&X"/"5/-H=/$='"<'/4.*'"564 Lª Quang TuyÕn Trêng THCS T«n ThÊt ThuyÕt Trang 96 [...]... tàõc cäüng phán säú • Tênh cháút cå bn ca phẹp cäüng phán säú Bi táûp tràõc nghiãûm Trong cạc cáu sau Hy chn cáu âụng −2 3 Mún cäüng hai phán säú v ta lm nhỉ sau: 3 5 a) Cäüng tỉí våïi tỉí, cäüng máùu våïi máùu (cáu sai) −2 3 b) Nhán máùu ca phán säú våïi 5, nhán máùu ca phán säú våïi 3 räưi cäüng 3 5 hai tỉí lải (cáu sai) Lª Quang Tun Trêng THCS T«n ThÊt Thut Trang 109 Giạo ạn Toạn 6 c) Nhán c tỉí v... Tiãút 85: Ngày dạy: PHẸP NHÁN PHÁN SÄÚ A MỦC TIÃU: • HS biãút váûn dủng âỉåüc quy tàõc nhán phán säú • Cọ k nàng nhán phán säú v rụt gn phán säú khi cáưn thiãút B CHØN BË CA GIẠO VIÃN V HC SINH : • GV: Bng phủ • HS: Bng nhọm, bụt viãút bng C TIÃÚN TRÇNH DẢY HC : Hoảt âäüng ca tháưy Hoảt âäün g 1 Hoảt âäüng ca tr KIÃØM TRA BI C (5 ph) HS1 * Phạt biãøu quy tàõc tr phán säú? HS lãn bng phạt biãøu quy... 28 19 GV cho HS nháûn xẹt bi trãn bng v = = 56 56 âạnh giạ cho âiãøm Hoảt âäün g 2 QUY TÀÕC (18 ph) GV: åí tiãøu hc cạc em â hc phẹp HS: Mún nhán phán säú våïi phán säú ta nhán phán säú Em no phạt biãøu quy nhán tỉí våïi tỉí, máùu våïi máùu tàõc phẹp nhán phán säú â hc? 2 4 2 4 2.4 8 = Vê dủ: Tênh ⋅ HS: ⋅ = 5 7 5 7 5.7 35 GV u cáưu HS lm ?1 Hai HS lãn bng lm bi táûp Lª Quang Tun Trêng THCS T«n ThÊt... tỉí lải (cáu sai) Lª Quang Tun Trêng THCS T«n ThÊt Thut Trang 109 Giạo ạn Toạn 6 c) Nhán c tỉí v máùu ca phán säú −2 våïi 5, nhán c tỉí v máùu ca phán säú 3 3 våïi 3, räưi cäüng hai tỉí måïi lải, giỉí ngun máùu chung (cáu âụng) 5 −2 d) Nhán c tỉí v máùu ca phán säú våïi 5, nhán c tỉí v máùu ca phán säú 3 3 våïi 3, räưi cäüng tỉí våïi tỉí, máùu våïi máùu (cáu sai) 5 Hoảt âäün g 4 HỈÅÏNG DÁÙN VÃƯ NH (2... HS: Täøng ca nhiãưu phán säú cng cọ tênh cháút giao hoạn v kãút håüp HS: nhåì tênh cháút cå cå bn ca phán säú khi cäüng nhiãưu phán säú ta cọ thãø âäøi chäø hồûc nhọm cạc phán säú säú lải theo báút cỉï cạch no sao cho viãûc tênh toạn âỉåüc thûn tiãûn âäün g 3 a) GV Theo em täøng ca nhiãưu phán säú cọ tênh cháút giao hoạn v kãút håüp khäng? GV: Váûy tênh cháút cå bn ca phẹp cäüng phán säú giụp ta âiãưu... bi 61 GV âỉa bng phủ ghi bi 61 Âụng hay sai? Cáu 1: Sai Cáu 1: Täøng ca hai phán säú l mäüt phán säú cọ tỉí bàòng täøng cạc tỉí, máùu Cáu 2: Âụng bàòng täøng cạc máùu Cáu 2: Täøng ca hai phán säú cng máùu l mäüt phán säú cọ cng máùu âọ HS: Hiãûu ca 2 phán säú cng máùu l v cọ tỉí bàòng täøng cạc tỉí mäüt phán säú cọ cng máùu âọ v cọ tỉí u cáưu lm cáu b (61) bàòng hiãûu cạc tỉí HS âc âãư bi Tọm... dạy: TÊNH CHÁÚT CÅ BN CA PHẸP CÄÜN G PHÁN SÄÚ A MỦC TIÃU: • HS biãút cạc tênh cháút cå bn ca phẹp cäüng phán säú: giao hoạn, kãút håüp, cäüng våïi säú 0 • Bỉåïc âáưu cọ k nàng âãø váûn dủng cạc tênh cháút trãn âãø tênh âỉåüc håüp l, nháút l khi cäüng nhiãưu phán säú • Cọ thỉïc quan sạt âàûc âiãøm cạc phán säú âãø váûn dủng cạc tênh cháút cå bn ca phẹp cäüng phán säú B CHØN BË CA GIẠO VIÃN V HC SINH... soạn: Tiãút 82: Ngày dạy: LUÛN TÁÛP A MỦC TIÃU: • HS cọ k nàng thỉûc hiãûn phẹp cäüng phán säú • Cọ k nàng váûn dủng cạc tênh cháút cå bn ca phẹp cäüng phán säú âãø tinh âỉåüc håüp l Nháút l khi cäüng nhiãưu phán säú • Cọ thỉïc quan sạt âàûc âiãøm cạc phán säú âãø váûn dủng cạc tênh cháút cå bn ca phẹp cäüng phán säú B VIÃN CHØN BË CA GIẠO V HC SINH : • GV chøn bë bng phủ ghi bi táûp 53, 64, 67 (30,... phẹp trỉì säú ngun 3 Âc trỉåïc bi: Phẹp trỉì phán säú Ngày soạn: Tiãút 83: Ngày dạy: PHẸP TRỈÌ PHÁN SÄÚ A MỦC TIÃU: • HS hiãøu âỉåüc thãú no l hai säú âäúi nhau • Hiãøu v váûn dủng âỉåüc quy tàõc trỉì phán säú • Cọ k nàng tçm âỉåüc säú âäúi ca mäüt säú v k nàng thỉûc hiãûn âỉåüc phẹp trỉì phán säú • Hiãøu r mäúi quan hãû giỉỵa phẹp cäüng v phẹp trỉì phán säú B CHØN BË CA GIẠO VIÃN V HC SINH : • GV... 3 + (-5) Váûy cọ thãø thay thãú phẹp trỉì phán säú bàòng phẹp cäüng phán säú dỉåüc khäng? Âọ chênh l näüi dung bi häm nay Hoảt p dủng: 3 − 3 3 + (−3) = =0 a) + 5 5 5 2 2 −2 2 + = + =0 b) −3 3 3 3 4 4 4 −2 = + c) + 5 − 18 5 9 36 − 10 26 + = 45 45 45 âäün g 2 1 SÄÚ ÂÄÚI (12 ph) 3 −3 + =0 5 5 −3 3 Ta nọi l säú âäúi ca phán säú 5 5 3 v cng nọi l säú âäúi ca phán säú 5 −3 5 3 −3 GV: v l 2 säú cọ quan hãû . ",:H&I_`KLa c7;H @;f 4 3 2 1 + − H@ 30 19 6 5 5 x − +=  (@ )4()7( 7 5 4 3 21 15 24 18 − + − = − + − Kl f 28 41 28 20 28 21 − = − + − K"H#$0$123/J/=U-'"5);< @;f 4 1 4 3 4 2 4 3 2 1 =+ − =+ − H@ 30 19 6 5 5 x − +=  30 19 30 25 5 x − +=  30 6 5 x =  5 1 5 x = ;fR )+4.*K mP!>Kl'"@ A&R 4.*//'"5646$ @ 5 2 6 1 + H@ 4 7 5 3 − + /@ 6 5 )2( − +− A&K >A&_A@4.*//'"564 @ 8 5 8 1 − + − .bUH=*U&7+4Q*"-&b/5$ JHJ/ R@ 30 17 30 12 30 5 5 2 6 1 )6() 5( =+=+  KH@ 20 23 20 35 20 12 4 7 5 3 )5()4( − = − += − + b /@ 6 17 6 5 6 12 6 5 )2( − = − + − = − +− .bUH=*U&7+4Q*"-&b/5$ JHJ/ R@ 8 5 8 1 8 5 8 1 − + − = − + − Lª