m so BAI TOAN NHAM REN LUYEN KHA NANG KHAI qUAT HOA CHO HOC SINH Tliu HOC Q ThS, VU THI H O A C H '''' TJrong dgy hgc mdn Todn d cd''''p tllu hgc, bdn cgnh vipc trang bj cho hgc sinh (HS) nhOng ca sd vd quy[.]
m so BAI TOAN NHAM REN LUYEN KHA NANG KHAI qUAT HOA CHO HOC SINH Tliu HOC Q T Jrong dgy hgc mdn Todn d cd'p tllu hgc, bdn cgnh vipc trang bj cho hgc sinh (HS) nhOng ca sd vd quy tfic cua lu kinh nghi#m, gido vidn (GV) cfin tdng budc tnang bj cho HS tu li lufin khoa hgc D l hidn thi/c hda mfit cdch dOng dfin xu hudng quan trgng ndy, ddl hdi cd $V nghien cuu ridng to hgp cdc vd'n d l logic vd tdm If hgc, lidn quan d i n bdn chfil cdc tri thdc kinh nghl|m vd If lufin, luong quan giua cdc khfa cgnh ci3a hogt dfing nhfin thdc cOa ngudi, nhu: cdm Hnh vd If Knh, In/c quon vd hvu tuqmg, cdi cy the vd cdi khdi qudt Co sd bdn Irong lidn kit cdc khfa cgnh dd Id cdc qud trinh khdi qudt hda (KQH) Irong tu vd cdc qud trinh cd lidn quan chfit dni vdi chOng Id hinh ihdnh khdi nl^m - mfit dgng hogt dfing trf tu$ co bdn vdi HS H I U hgc, tu van cdn phy thufic nhieu vdo cdi cy t h l ; Irong todn hgc mong nfing h'nh truu tugng, khdi qudt coo, vdy vide hinh thdnh khd ndng, ndng lye KQH cho HS tllu hgc Id rai can ihiel CDng tu cua HS tllu hgc Id lu cy t h l nen nhieu bdi todn d tiiu hgc mgl chung myc ndo dd dd xdy dyng ihdnh mfiu dgng lodn cd Idl gidl ihong nhfil iheo cdc budc cy t h l , mfii quy lfic chung nhfil md chf thyc hifn theo cdc budc dd hofic cdc quy tfic dd to Ihu dugc idi gidl Vdi li dd, bdi vlll ndy trinh bdy mfit sfi bdi lodn nhfim rdn Iuy0n khd ndng KQH cho HS lilu hgc vd vd'n d l phdt Irlln ngdn ngu todn cho HS tllu hgc qud Irinh hinh ihdnh vd phdi Iriln khd ndng KQH DQ\ Bdi lodn (Bdi todn ve tfnh td'ng nhilu so): Hay tinh ling eCa cdc so sau ddy: 10+ 1d+13 + W+ 1d+ 13+ 10+ 1d+13+ 10 + 1d+13+ W + 1d+13+10+1d+13 Gidl: Cdch /.'Tfing Irdn cd tfing (10 + I d + 13) dovgyketqud timducfcld:(10-t' I d ' f ) x d = 234." Cdch 2: Cd sdu so 10, sdu so 16, sdu sfi 13, Tap chi Blao due so (ta i - 7/aoia) ThS, V U THI H O A C H ' ta cd lfing sou: x d - ^ x + x d = d ' ^ 96 + 78 = 234 Cdch 5; Tfing (10 't-16) bfing tfing (13 + 13) Nhu vfiy cd 18 Ifin sfii dugc cfing Igi vdl nhau, hoy: x - Dd'i vdi dgng bdi todn Irdn, dilu cfin thilt Id glup HS hudng din v l ^ Hm kilm mfii md hinh hay mfit Idi gid! mau Di thyc hi$n dilu ndy, GV chia bdi lodn thdnh cdc phfin nhd, ydu cfiu HS gidi quyll cdc phfin nhd dd trudc Trong vf dy trdn, GV cd thl ydu cfiu HS gidi quylt cdc bdi todn nhd hay cdc phan nhd nhu: Irung binh cfing cua cdc so trdn Id boo nhidu?; mfit sfi Irong long trdn xud't hidn bao nhidu lfin?; cd thl fim dugc nhung cdp s5' ndo cd tong bfing nhau? Khi gdp mfit bdi todn tucmg ty vdi bdi todn ndy, dilu cfin phdi cd doi vdi moi HS Id mot «(sdng y ndy sinh tu Hem thuc' Bdi lodn ndy HS dd dd gdp boo gid diua? Cd i h l dp dyng dugc gi lu bdi lodn tuong ty? Tu dd hoy tgo co hfii cho HS hf minh Hm tdi phuong phdp gidi lodn, hvdc dua hudng dan Tu cdc dfic dilm vd cdc dd'u hidu don Id cOo cdc tri gidc vd bieu lugng cd t h l rut Hnh khdi qudt cua vd'n d l dd, vd d ddy Id hudng gidi quylt cho mfit logl cdc bdi todn tuong t\f Bdi lodn 2: C6 mot dogn ddy ddl 35cm Ngudi ta cdt dogn ddy dd thdnh c6c dogn ddy nhd c6 dd ddi 7an Hdi: a) Ngudi ta thu dugc bao nhiiu dogn ddy nhd?; b) Ngudi ta cdn cdt boo nhieu nhdt? Gidi: a) So dogn ddy thu dugc Id: 35 : = (dogn ddy) O ddy, HS cd thl si) dyng nhOng kiln thuc v l phep chia de gidi b) GV cd t h l hudng dan HS gidl nhu sou: - Neu thu dugc dogn ddy nhd ihi can cfii bao nhieu nhdt? (vdi md hinh bdn, so nhdt cfii Id nhdtcfilvd = - ) *TnriiiKCaodiHltJIDi«BS - N^u thu dm?c doqn dfiy nh6 thi cfin c6t quylt To xem xit boo nhiiu nh6t? (b^ng ni6 hinh bin, iii nh6t cdt ^1 cdc tn/dng hgp ld2nh6tc mdt dinh dIh hoy Ichdng? Cd gidl phdp ndo khde khdng? mdt cgnh ddl dlfn thl sd torn gidc thu d u ^ si Id GV yiu cdu HS nhin nh sd dogn ddy Idm thl Bdi todn 4: Vlil sil ihtch hgpvdochS Mm ndo d l cd sd nhdt cdt?; -f TO sd nhdt cdt Idm thl vd gidl Ihlch edd) viit a) 1, 3, 5, , ; h) 1, ndo d l cd sd dogn ddy ihu dugc sou cdc Idn 2, 3, 8, , ; c) 3, 7, 11, 15, , cdt?; + Vilt m|nh dl bilu th| mdi quan h$ glOa D l gidi bdi todn ndy, HS phdi niu dugc bdn sd dogn ddy vd sd nhdt cdi? chdt (cdc quy ludt) cOo cdc ddy sd G ^ cdu hdi trin dugc GV tasls to oilentthe survey of reality at high schools In Toy Ninh province to realise the shortcoming In consttuctlng management cadres From this propose groups of measures on realisation and the combination between Education & Training Department and local executive committees, groups of measures on cadtes, NXBG((1Oasls to oilentthe survey of reality at high schools In Toy Ninh province to realise the shortcoming In consttuctlng... cdc trudng hgp cv ihl da thi/c hl$n ihu ba, mfii sd bdng tdng hai sd tiln trudc nd Bdi lodn 3: Cho tam gidc ABC Td dinh A Ihvc hifn theo quy ldc ta ihu dugc Idt gtdi mdt dognrfidngxudng cgnh