BÀI TÂP CẢ NĂM 6 ĐẾN 9

- ' ~ BAITAPTUAN • ? , ·CAN.At\M · , N6 •, G IaO e ,A VI CD: Hoc sinh: · • Trtrirng: I I • \ BAI T~P TUAN cA NAM TOAN TOAN - TUAN ! , : TOAN -TUAN ••• .• "' ~ .•.• ••• TOAN - TUAN "' TOAN - TUAN ~ • •• •.•• • • •• .• ••.••••.•.••••••••••••••.•••••••.••••••• , TOAN 6-TUAN5 .• .• • ••.••.••••.••• • •.• ••• , , TOAN 6- TUAN • • , "' TOAN -TUAN • • , , TOAN - TUAN + •• •.• 10 DE CUONG ON T~ GIUA HQC Ki I MON TOAN 10 TOAN - TUAN 10 ······························································································~ 12 TOAN 6- TUAN 11 • • .• • .• .• • • • ••• • • • • 13 TOAN - TUAN 12 ~ .•• • •• 14 TOAN - TUAN 13 15 TOAN 6- TUA.N 14 •• .•• 16 TOAN - TUAN 15 ······························································································· 17 TOAN 6- TUAN 16 • • •• .• • • • • • •.• •.•.• • •••.• 18 , : TOAN 6- TUAN 17 19 TUAN 18 + 19: DE CUONG ON T~ HQC KY I 20 , , TOAN - TUAN 20 • •• · • •.•.•••• ••• ••.••••• 25 "' TOAN - TUAN 21 •.• • • 26 , "' TOAN - TUAN 22 .• .• • • 27 , "' TOAN - TUAN 23 • •.••.• .•.• 28 , TOAN6 - TUAN 24 .• •• • • 29 , TOAN6 - TUAN 25 ··················································o·······o···································· 30 , " TOAN - TUAN 26 · 31 , " TOAN - TUAN 27 + 28 32 I>E CUONG ON T4P KlEM TRA MON TOAN GrUA Ki ii 32 " TOAN6 - TUAN 29 • • • .• ••• 35 TOAN - TUAN 30 • ••• • •.•.••• •.••.•• • ~~ •• • • • •• • •.••• • •••.•• 36 TOAN ~ TUAN 31 37 TOAN - TUAN 32 •··••·••••••••••··•·•••••·•··••••••·•·•·••••·•·•••·••••·•·•••·•••••···•·••••••·•••···•••••••••• 38 TOAN - TUAN 33 .· • •••••••••.•• ••• •.••••••••••••.•.• ••••• 39 , " TOAN 6- TUAN 34 · · • 40 I>AP AN TUAN 41 D.AP A.N TUAN 41 _···_··~···_··_···_··_···_~·_···_··_· _···_;·_···_··_···_··_···_··_ ·_··~···~··_···_ _ _ _ _ _ _ ._ ._ _ ·_··_··~~ _B_A_P_A_,N T_U_A_N 3_ _ :· I · , , , , ' :DAP AN TUAN • • .•• •• •.• • • • .• •.•.••••••••• •.• •• •.• 44 , , BAP AN TUAN 45 :DAP AN TUAN + ···································································-························ 47 ··- -· -·· ·· BAP AN TUAN 10 ~-~~~:~:·:~~~.-.•- 48 BAPANTUAN 12 ······································································· ······················ 50 BAPANTUAN 13 ···························································•·····•··•••·••·•··•··•···•·····•·•··· 51 BAP~TUAN 14 ·······································································-························ 52 BAPANTUAN 15 ~ 52 , , BAPANTUAN 16 •.• •• • 53 BAPANTUAN 17 ·······································································-························ 54 BAPANTUAN 18-19 ~ 54 , , BAP AN TUAN 20 • • •.• •• ••• • •• •.•.••.• •• •.• ••••••••••.•••••••• •••.•• • 58 , , BAP AN TUAN 21 59 , , BAP AN TUAN 22 • • •• 59 , , BAP AN TUAN 23 • •.•.••••.•••• • • 60 , , BAP AN TUAN 24 .• •.• • • 60 , , BAP AN TUAN 25 .· • ••• •• .• 61 , , BAP AN TUAN 26 ~ ••.•••••• ~ 62 , , BAP AN TUAN 27 + 28 • •• 62 , , DAP AN TUAN 29 •• .• • 65 , , BAP AN TUAN 30 • • • 65 , , BAP AN TUAN 31 • 66 , , BAP AN TUAN ·32 • • • • • •• .•.• 66 , , BAP AN TUAN 33 .• 67 , , BAP AN TUAN 34 68 ··- - - · · ·.- TOAN 6- TUAN I SO HQC: Ph~n ru- Tip hC!IJ sa tv nhien Bai 1: ViSt cac ~P hgp sau bfutg each li~t ke cac phfut tir a:> T~p hgp cac s& t\I nhien khac va nho hon ho~c bfuig 27 b) T~p hgp cac s& t\I nhien co hai chfr s& va co t~n cimg la c) T~p hgp cac s& t\I nhien co hai chfr s&, chfr s& hang don vi Ian hon chfr s& hang ch\lc la I d) T~p hgp cac s& t\I nhien X th6a man: - 2.x = Bai 2: Tim x hiit: a) 7.x + 3.x = 2010 b) (x- 6) (x-12) = Bai 3*: Cho A={2; 4;6;8;10; } a) s& gQi las& h~ng thu nh§t; s& 4la s& h~ng thu hai; Hoi s& h~ng thu 1005 las& nao? b) Tinh t&ng: S = + + +2016 II HiNH HQC: Di~m - DuiSm A nk tren duang th~ng m va duang th~ng m khong di qua diSm B vadiSm c a) Hay ve hinh va viSt ki hi~u b) L§y diSm D n~m tren duang th~ng AB c) Hay ve ducrng th~ng n vira di qua diSm B vt'ra di qua diSm C Hay kS ten nhfrng diSm rna duemg th~ng n khong di qua, hay viSt ki hi~u Bai 6: Cho duerng th~ng a va diSm A thu9c ducmg th~ng a va diSm B khong thu9c duang th~ng a a) Ve hinh va viSt ki hi~u b) Ve diSm M thu9c duang th~ng a (M *A) ~ TO.AN6-TUAN2 I SO HQC: sa phin tti- ctia t{ip hQP, t{ip hCfP Phep c(}ng va phep nhan M ={I·,3·,5·,7·,9·,11· ' 13·'15·17· ' '19· ' 21· ,23· ' 25} F = {n e N l2n = 1} E = {n eN InS 100} G ={xI x = 2n; n e N} Bai Cho M = {a; b; c} Hay viSt tAt ca cac ~P hgp cila M gAm: a) pMn tir c) phdn tir b) phdn tir Bai 3: Cho ~P hgp A={ 5; 7; 9; 11}; B={ 5; 7} va Hay diBn d~u thich hgp vao o trBng: 1l A; IO B; {5;7} A; A B; B Bai Tht;rc hi~n phep tinh theo each hgp li: a) 99-97 + 95-93 + 91-89 + +7- +3- b) 189 + 424 +511 + 276 +55 c) (125.37.32) : d) 36.18 + 36.82 + 64.141 -64.41 e) A= + + 11 + 14 + + 302 f) B = + 11 + 15 + 19 + + 203 Bai 5.Tim s6 tt,r nhien x, y bi~t: a) (x-32) :16 = 48 b) 814- (x- 305) = 712 c)xy-2x= d).x + (x + 1) + ( x+ 2)+ + (x + 100) =10100 II HiNH HQC: Ba tti~m thing hang Bai Ve hlnh theo each diSn ~t sau: (Ve tren cimg mQt hlnh) a) Ve hai diSm A, B Ve duemg thfuig m di qua hai diBm A, B b)DiBm D nfun gifra hai diSm A va B, diBm C khong thuQc duemg th~ng m c) Hay kS ten diSm khong th~ng hang d) Ve duCm.g thkg di qua hai diSm C, A Bai 6*: Cho ba diSm A,B va C th~ng hang; D Ia diBm rna C n~m gifra Ava D a) Chirng minh ba diSm B,C,D th~ng hang b) BiSt rfuig B n~m gifra_A va C Hay chi C n~m gifra nhfrng diSm nao? Bai 7*: Bac An c6 cay xanh Em hay giup bac ~y trAng: a) cay d6 hang, cho m6i hang c6 cay xanh b) cay hang, cho m6i hang c6 cay xanh TOAN 6- TUAN I SO HQC: Phep c()ng, nhan, chia, trir Bai Tinh b~g each hgp li: a) 81 + 243 + 19; b) 5.25.2.16.4; ~ c)1+3+5+7+9+ + 2015; d) + + + + + n; e) 36.28 + 36.82 + 64.69 + 64.41; f) 2.3.12 + 4.6.42 + 8.27.3; g) 100 + 98 + 96 + +2- 97 - 95- - Bai Tim s6 tg nhien x biBt: a) (x-42)-110 =0; b) 315 + ( 146 - x) = 401; c) 2436: x= 12; d)6x-5=613; d) 74 (x- ) = 0; e)x-36: 18=12 Bai M9t phep trir c6 t6ng CUa s6 hi trir, s6 trir va hi~u b~ng 1062 s6 trir 16n han hi~u Ia 79 Tim s6 bi trir va s6 trir ·II HiNH HQC: I>uimg.thing di qua hai di~m Bai Em hay cho biBt c6 thS ve duqc bao nhieu du(mg thfutg phan bi~t di qua cac c~p diSm m6i tru(mg hqp sau: a) V&i hai diSm phan bi~t cho tru6c b) v&i ba diSm phan bi~t cho tru&c va khong th~ng hang c) V6i bBn diSm phan bi~t cho tru6c, d6 khong c6 ba diSm nao thfug hang d) V 6i 10 diSm phan bi~t cho tru6c, d6 khong c6 ba diSm nao th~ng hang e) * V6i n diSm phan bi~t cho tru6c, d6 khong c6 ba diSm nao th~ng hang Bai s: a) Ve bBn diSm A~ B;·C; D choA-;-B;-eih~ng-hfmg va C, IT,1nhimg liang: Hoi bBn diSm A, B, C, D c6 luon luon thfuJg hang khong? b) Ve nam diSm A, B, C, D, E cho A, B, C th~ng hang va D, B, E th~ng hang Hoi nam diSm A, B, C, D, E c6luon luon th~ng hang? ! _ _ _ ~· TOAN 6- TUAN I s6 HQC: Luy~n tfp phep c(jng, tri:r, nhan, chia, lfiy thira v6i s6 tv nhien Bail.ThlJc_hi~n phep tinh hing cii~h hgp 1Y.: a) (44.52.60): (11.13.15); h*) 2016 20152015- 2015.20162016 c) 46.37 + 46.63 +.54.267 - 54.167 d) 36 :32 -23.22 Bai 2.Tim s6 t\1 nhien x hiSt· c) 7x-13 = 2.3 ; a)x-36: 18=12 d) (3x- 9) 12 = 32 23 ; Bai 3* Cho A= + + 32 + 33 + + 10 • Tim s6 tlJ nhien n hiSt 2.A + = 3" Bai M(>t phep chia c6 t&ng s6 hi chia, s6 chia hfug 80 BiSt rfug thuang Ia va s6 du Ia Tim s6 hi chia va s6 chia ll HiNH HQC: Bi~m - Dtrimg thing Bais a) Cho di~m A, B, C, D d6 diSm A, B, C thfug hang va ba diSm B, C, D th~ng hang C6 th~ kSt lu~ gi vS di~m A, B, c, D h) Ve nam di~m A, B, C, D, E thoa man tAt ca cac diSu ki~n sau day: + Di~m C nfun giua di~m A va di~m B + Ba di~m: C, B, E thfutg hang +Di~m A va di~m B cimg phia d6i v6i diSm E + Di~m D khong thu()c duc cac du12n +2:d Bai 11: a) x chia du => x + 2:7 x: 13 du 11· => x-+ 2: -13(x+2) ;91 => va 13 Ia hai s6 nguyen t6 cung b)x+ 2: 91 =>x :91 du91-2 = 89 Bai 12: Gi s6 hQc sinh tham quan Ia x (x eN*) =>x: 40 va x: 45 X E BC(40;45) => X = => BC(40;45) = 360 => 700 0) x la l1CLN(52;36) => x = (em) Bai 14: G9i s6 t6 chia dugc lax (x > 1) X E l1CLN(20;24) ~ lfCLN(20;24) = =>l1C(20;24) = {1;2;4} l:\ =>X= {2;4} Cach chia So to SoHSnam SoHSnu 10 12 , => V~y chia lam to thi so hQC sinh it nhat ' ' Bai 15: GQi s6 HS cua tnrcmg Ia X (HS X EN*, X < 2000) X- : 36; 48 va 52 =>(x - 8) E BC (36;48;52) BCNN(36;48;52) = 1872 X< 2000 =>X- < 1992=> x- = 1872=>x = 1880 (TM) Bai 16: a: 16 du 13 =>a+ : 16 => a+3 E BC (16;18) a : 18 du 15 => a + : 18 BCNN (16;18) = 144 a E(100;150) => a+3 E(103;153) =>a= 141 Bai 17: 95 chia cho a dugc thuang Ia m du => 95- = m.a => 90 = m.a 57 chia cho a dugc thudng la n du =>57 -3 = n.a =>54 = n.a 38 chia cho a dugc thuong lap du 2=> 38-2 = p.a =>36 = p.a 90:a} =>54: a ::::>a E l1C(90;54;36) lfCLN(90;54;36) = 18 36:a =>a= {1·2·3·6·9·18} ' ' ' ' ' a>5 =>a= {6;9;18} => 90 = a.m =>a~ 10 =>a =18 m=5;n=3;p=2 V~y s6 chia la 18, thuong la 532 Phgn hinh hoc: I Tr~c nghi~m Bai 1: _A S Bai 2: c B.S C.B D.B E S 2.D 3.C 4.A S.C 57 L -~ II Bai ~p tg lt$1 b) o Ia trung diem clia clia cB Bfli I: a) AB = em Bai 2: a)Be ·=-2 cm -ho~c Be-=-H) em b)MN= I cmho~cMN = Bai 3: a)AB = em em b)MN = I,5 em c) Cac c~p tia dfiinhau: OM va MB, ON va NB, OA va AB Bili 4: a)NP = em b)NQ = NP = em Bili 5: a)MA=MB=4cm b) MI=MK = em DAP AN TUAN 20 Bai I: a) < c)> b) < c) -504 b) - I200 Bai 2: a) -11000 Bai 3: a) X = -2 b) X = 4I e) (x; y) = {(13;3);(2;14);(- 11;1);(0;- 10)} c) X = -8 d) X f) x = ho~c x = -8 g) (X + 2) > Va X + > ho~c (X+ 2) < Va X + < :::> X > - ho~c X < - X EZ Hinhhoc Bai I: a) Tia MK niim giii'a tia :MP va tia MN - tia NH niim giii'a tia NP va NM b) co t z y X u 58 = - I0 Bai 1: a) 52400 b) 4700 Bai2: a)x=-12 b)x=O DAP AN TU.AN 21 d) -200 c) c) x = 28 e) 300000 d) x = -3 ho?c x = e) x = -7 ·' x = hoac x=2 Bai 3: a)M= o b) B =-68 c) (a +'b)(x- y) = Bai 4: a) n = -8 b)n=3 c) n = -5 ho?c n = -7 d) n = - Bai 5: x+2 -3 -1 X -1 -5 y-1 -1 -3 y -2 b)x=2;y=-3 x=4; y= -1 DAP AN TUAN 22 I SO HOC Bai 1: a) -13000 b) -47 c) -13500 Bai 2: a) X= b) X = -1 C) X =B=ai: -=3-=-: a) 1; -1; 3; -3; 5; 15 = -1 ho?c X = b) -13; 0; 13; 2; Bai4: A> B Bai 5: s = 1- + 32 - 33 + .399 - 3100 3S=3-32+33 +34+ +31oo_ 1o1 3S + S = 1-3 101 (1-3101) => S =_, ·_ _,_ II Hinh hoc: Bai 1: G6c nhQn: :MPN; CBD NJiE JViiiE,ABC G6c vuong: G6c tl1: G6c byt: ! i Bai 2: AiiJ5 Aol5 = soo 59 ~ ~ Bai 1: a) DAP AN TUAN 23 Bai 2: a) x = -4 , 3: a) = -4 ; B a1 -15 b) 20 b)x= c) x = 4; y =15; z = -6 -3 - 15 E 16 -3 20 -15 -3 d) -4 -15 -3 -3 - =4; Bai4: a)x-1 -15 -8 c) -5 b) _ _±_ e)- -4 -3 - 20 ~ -3 -15 20 11(13)= {-13;-1;1;13} => x= {-12;0;2;14} b) x+3=x-2+1= +_1 x-2 x-2 Bai 5: E x-2 U'(l)= {-1;1} => x= _!=-2- => a a+3 x-2 {1;3} a= Hinhhoc: Bai 1: a) Tia Oy nfun gifra tia Ox va tia Oz b) yoz=45° Bai 2: a) Tia Oz DAP AN TUAN 24 I SO HOC Bai 1: a) 13 b) 259 ~ c) -5 b)x= -12; y=-16 Bai 2: a) x = 2; y = -21 ' · 3: G 91· ph"an so~ can ~ t1m ' 1'a: -=> - 39 a a = 10 (Tli.AT\K) 1vJ.JJ B a1 " 24a _ _ " so~ can ~ ' 1'a: 390 trm Phan 240 Bai 4: Ta c6: ~ ~ ~ = => ( ~) = 1{ ~) 3 = 1{:) = => Bai 5: a) g9i d la U'CLN(n + 1; 2n + 3) =>(2n+3) va(n+ 1) :d =>[(2n+3)-2(n+1)Jd 60 a~ b = c ~- g1an ·· ·1:.d => d = => 2n+l n+ 1'a ph~an so~ t01 b) Tuong 1\f diu a II.Hinhhoc Bfti 1: a) tia Oz nfun gifra hai tia Ox va tia Oy b) ZoX = 20° Bfti 2: a) tia OB n~m gifra tia OA va tia OC b) 00c=50° I>AP AN TUAN 25 I s6 hoc 31 15 -44 b) 48; 48;48 ' 1: a ) 22 - 20 -21 - ··B a1 36 ' 36' 36 57 55 -58 c) 66;66; 66 d) -1836 -81 -315 756 ; 756; 756 Bai 2· -20.-9 _!± - _!i._±_ 24 ' 24 ' 24 ' 24 ' 24 ' 24 , ) 91 n · , 100 100 Bai 4: a 195 va 195 ; n = 9f ' : a) -va ' -1 Ba1 2 b) - va' -1 quy d).ong -1 va' -5 15 15 15 756 , 697n 756 b) 2214 va 2214; n = 697 II Hinhhoc Bai 1: a) tia OB n~m gifra tia OA va OC AoC AO.M' = I05° c) Bai 2: d) Tia oc la tia phan giac Jj(jjj j' 61 - - - - - - ·• ' BAP AN TUAN 26 I s6 hoc 149 163 163 b) 257 < 257 < 221 ' : a) 16 B at c 15 ) 179 45 d) 896 99 b.\ , : I glO' "' va' A ch'ay dugc S B at e ·' va' B ch'ay dugc bxe I glO' •, va' ca• hat• Cu.c:1y L.:l dugc S + = bAe I glO' 20 10 , vm ' ch'ay chua duac nua bAe Ta co, : = - => - < - V"ay I a1a 20 20 b' • , : ·M =a+I B at a = 5k + (k E Z) Bai 6: a) Tia Oz nb gifra tia Ox va tia Oy BAP AN TUAN 27 + 28 Bai I: a) - 350 Bai 2: a) ! Bai 3: a) x = -I2 b)-40 c) -3IOO d) 450 b) - I c) - d) 15 I gio t6 II lam dugc x = I4 ho~c x = b)l x - 71 = c)x=I;y=36;Z_=l2 Bai 4: I_ gio t6 I lam dugc _ - 35 Q}_U IIO I 90 B> IO + IOO =l=>B>l c) C =(!+!+ +!)+(I~+ I\+ + I~) I I I I I I=s+ 6+ + Cl 1854 2266 Bai 3: 64 a)AOB =Bot= 400 b)EOiJ =40°;.800 =soO c )Bi5C = EOD = 4oo Biti 4: a) ToM= 600 o ··.· ~ b) COM=C0A=30 ·_, ~ ~ - DAP AN TUAN 29 I s6 h 9c , -11 -15 -7 -36 b) 36;7 lS;U Ba1 I: a) '"2 :a) x= 10 B a1 c) 21 10 b) -14 -15 ls;M c)x=2 X=- -27 b) -27 c) 40 50 · r d) 4; d) X= 14 d) 637 48 Bai4: M II HinhhQC Bai 5: a) Khong vi ;t:.I,5 +1 Bai 6:a) AoC = 70° ,J50C = 110° b) Ve (A; 3cm); (B; em) c~t -~ - DAP AN TUAN 30 , 1:a) x = - 29 B at - b) 28 71 -5 X=- c)x=-1 13 hoacx=-I d) x =3=>x=2 I Bai 2: a) Bai 3: a) v -b) 23 d) c)- s6 dn tim la 21 , 4:48 B -80 65 126 103 DAP AN TUAN 31 I sA hQc b) -1 Bai 1: a) ! sA hQc sinh ~t danh hi~u Chau ngoan Bac HA Ia: 48 =36 (hQc sinh) Bili 2: n HinhhQc Bai 1: a) foY=60° b) tia Ot Ia tia phan giac XOy = c) ·indY= Xoy 120° 3cm 2,5 em b) N Ia trung di~m AC L la trung di~m BA Bai 3: a) Tia OB nfun gifra tia OA va tia OC b) Boe = 70° Tia OB khong phai Ut tia phan giac cua g6c AOC -~ -~ -~ ~ DAP AN TUAN 32 sA hoc Bili 1: Tinh a) 200 b)!! - 208 d) c) 485 Biti 2: Gia tiSn h9p but Ia: 12.000 dbng Gia tiSn t~p giAy lit: 6.000 dbng 66 - 161 e) - - g) 26.25 Bai 3: Ngay thu lam duqc Ngay thu lam duqc 1-~- ~ = ~ ~ 60 = (do~n duemg) (m) I3,.i 4: 5-1 1 = = -= 1.3.5 1.3.5 1.3.5 1.3.5 1.3 3.5 7-3 1 3.5.7 = 3.5.7 = 3.5-5.7 _ (n+4)-(n) _ n(n+2)(n+4)- n(n+2)(n+4)- n(n+2) (n+2)(n+4) s = 1~3- 3\ + 3~5- 5\ + + 59~61- 61~63 + 61~63- 63~65 b) I 1.3 1· 63.65 =3- 4095 1364 = 4095 II.Hinh hoc Bai 5: a) Tia Oy n~m gifra tia Ox va tia Oz b) YOZ=7o0 DAP AN TUAN 33 r.s6 hoc Bai 1: a) b) -18 Bai 2: Ngay thu d9i sira duqc 1-%-! = Do:;m ducmg dai: 7: Bai 3: d)40 c) 11 36 (do~n ducmg) = 36 (m) 36 S6 ph~n met vai l~i la ; =- (tam) 36 T~m vai h1c d~u dai 7: }_ = 36 (m) 36 Bai 4: Luc d~u s;.o sach , ngan ~ ; ; , , B = S tong so sach luc sau 67 e) 104 g) 12 , h ~ B = 12 tong A , h I A d" ngan soI sac S- 12 = 1'a cuon ch uyen Sol sac 25 25 25 Y~Y- sA sach la: 75 (cufin) S6 sach ngan B Ia: ~ 75=45 (cu6n) Bai 5: 1 1 A = 2.2 + 3.3 + 4.4 + + 2013.2013 1 1 - < - = 2.2 1.2 1 1 - A< ::::>A S6 thu hai Ia: ( 1~ 60 )= ( ~ - 1~) = 300 sa thu nhfrt Ia: 4/3.300 = 400 Bai Bai 3: 17126 68 X+4 y Bai 4· x =!1 X y y X = 3~-+- = 3~ ·y A· y=l (tum) Tubi cha hi~n nay: 44 (tubi) Tubi hi~n nay: 16 (tubi) Bai x + y= 10 X y -=-~X =3k,y =4k(k E z,k :;t: 0) =>7k = 70~k=10 V~y X= 30, y = 40 Bai6: x-y=15 X= X y 3k, y = k, (k EZ,k =t:O) k= 15 v~yx=45,y=30 II Hinh hQc J50C = CoE = 30° ·L·· 69 -·- ~ .• ... 314; 3 16; 318; 320} b) B = { 125; 130; 135; 140} 46 Bii2: a) 860 ;68 0;810; 180 ;61 0; 160 ;8 16; 1 86; 8 06; 1 06; 618; 168 ;60 8; 108 b) 860 ; 68 0; 810; 180; 61 0; 160 c) 860 ; 68 0; 810; 180; 61 0; 160 Bii... 1 46 - x) = 401; c) 24 36: x= 12; d)6x-5 =61 3; d) 74 (x- ) = 0; e)x- 36: 18=12 Bai M9t phep trir c6 t6ng CUa s6 hi trir, s6 trir va hi~u b~ng 1 062 s6 trir 16n han hi~u Ia 79 Tim s6 bi trir va s6... hang dQc cua m6i kh6i Ia nhu C6 thS xSp nhiSu nhfit mfiy hang dQc dB m6i kh6i dSu khong c6 le hang? Khi d6 m6i kh6i c6 bao nhieu hang ngang Bai 6* Tim s6tv nhien a, b, biSt: a+ b = 162 va lfCLN