Yog tias nws yog koj thawj zaug siv lub laij lej, txhua lub nyees khawm thiab cov kev xaiv tuaj yeem txaus ntshai me ntsis. Tab sis txawm hais tias koj tab tom siv tus lej laij lej lossis lub laij lej tshawb fawb, cov hauv paus zoo ib yam nkaus. Thaum koj kawm paub cov nyees khawm ua dab tsi thiab yuav siv lawv li cas rau kev suav sib txawv, koj yuav yooj yim dua siv koj lub laij lej thaum twg koj xav tau-sab hauv lossis sab nraum tsev kawm ntawv!
Cov kauj ruam
Txoj Kev 1 ntawm 2: Kawm Ua Haujlwm Yooj Yim
Kauj Ruam 1. Nrhiav lub hwj huam khawm yog tias muaj ib qho
Txawm hais tias feem ntau cov laij lej tshiab yog hnub ci siv lub ntsiab lus pom lub teeb tig lawv rau ntawm ib leeg-qee qhov kuj muaj "ON" lossis "ON/OFF" khawm. Yog tias koj pom ib qho ntawm cov nyees khawm khawm no, nias nws kom tig lub laij lej tawm thiab tawm.
- Yog tias koj lub laij lej muaj lub pob "ON", nias nws thaum lub laij lej tau qhib los tua nws.
- Qee lub laij lej txiav tawm tom qab siv tsis tau li ob peb feeb.
Kauj Ruam 2. Ntxiv cov lej nrog tus lej "+"
Ntaus lub pob "+" nruab nrab ntawm txhua 2 tus lej ntxiv rau lawv. Piv txwv, ntxiv 5 txog 10, nias "5," "+," thiab tom qab ntawd "10."
Ntxiv cov lej ntxiv rau koob. Piv txwv li, nias " +" thiab "5" ntxiv rau qhov sib npaug ntawm "5 + 10." Thaum koj xav tau cov lus teb kawg, nias lub pob "=" kom tau txais qhov sib npaug ntawm "20."
Kauj Ruam 3. Rho tawm cov lej nrog tus lej "-"
Nias lub pob "-" nruab nrab ntawm ib qho 2 tus lej kom rho tus thib ob los ntawm tus thawj. Piv txwv li, ntaus "7," "-," thiab tom qab ntawd "5" kom rho tawm 5 los ntawm 7 thiab ntaus "=" kom tau txais cov lus teb ntawm "2."
- Rho tawm cov lej ntxiv los ntawm koob. Piv txwv li, nias "-" thiab "2" kom rho tawm ntawm qhov sib npaug ntawm "2-7" thiab tom qab ntawd nias "=" kom tau txais cov lus teb zaum kawg ntawm "0."
- Sim rho tus lej tom qab ntxiv lawv.
Kauj Ruam 4. Muab cov zauv los yog muab cov zauv faib ua zauv nrog tus lej "÷" lossis "/"
Piv txwv li, kom faib 2 los ntawm 1, nias "2," "÷," thiab "1" thiab tom qab ntawd "=." Txhawm rau hloov cov feem 4/5 rau cov lej, nias "4," "/," "5," thiab tom qab ntawd "=."
- Yog tias koj siv lub laij lej lub cev, qhov faib qhov tseem ceeb yog "÷." Rau lub computer laij lej, faib qhov tseem ceeb yog "/."
- Sib faib ua ntu zus los ntawm nias "÷" lossis "/" ua raws tus lej. Piv txwv li, yog tias koj lub laij lej hais tias "2 ÷ 1," ntaus "÷," "2," thiab tom qab ntawd "=" kom tau txais cov lus teb zaum kawg ntawm "1."
Kauj Ruam 5. Muab cov zauv siv tus lej "x" lossis "*"
Piv txwv li, kom muab 6 los 5, nias "6," "x," "5," thiab tom qab ntawd "=." Cov lus teb kawg yuav nyeem "30."
- Lub laij lej lub cev feem ntau siv "x" ua tus lej sib npaug, thaum lub tshuab xam zauv lub computer feem ntau siv "*."
- Muab ntau ua ke los ntawm nias "x" lossis "*" ua raws tus lej. Piv txwv, yog tias koj lub laij lej hais tias "6 x 5," nias "x," "2," thiab tom qab ntawd "=" kom tau txais cov lus teb kawg ntawm "60."
Kauj Ruam 6. Nias lub pob "=" kom tau txais cov lus teb rau kab zauv
Tom qab nkag mus rau koj tus lej zauv thiab ua haujlwm, xws li ntxiv lossis rho tawm, ntaus "=" kom tau txais cov lus teb zaum kawg. Piv txwv li, nias "10," "+," "10," thiab tom qab ntawd "=" kom tau txais cov lus teb kawg ntawm "20."
Nco ntsoov tias koj tuaj yeem hloov koj qhov kev ua zauv yam tsis tau tshem txhua yam tom qab nias "=" tsuas yog nrog ←/→ qhov tseem ceeb, yog li nco ntsoov rov xyuas koj tus lej ua ntej
Kauj Ruam 7. Ntxuav koj lub laij lej cim xeeb siv lub pob "Clear" lossis "AC"
Txhua lub sijhawm koj xav so so lub tshuab xam zauv nco thiab txhua yam los ntawm cov zaub, nyem "AC" lossis "Clear" khawm. Piv txwv li, pib los ntawm nias "2," "x," "2," ua raws li "=". Tam sim no koj yuav tsum pom "4" ntawm qhov screen, uas tseem tau khaws cia hauv lub cim xeeb. Ntaus lub pob "Clear" thiab tus lej yuav rov pib dua rau "0".
- Lub pob "AC" sawv cev rau "Txhua Yam Ntshiab."
- Yog tias koj ntaus "+," "-," "x," lossis "/" tom qab "4" thiab tom qab ntawd sim pib qhov sib npaug tshiab yam tsis tau ntaus thawj "Clear," nws yuav dhau los ua ib feem ntawm qhov sib npaug tam sim no. Ib txwm ntaus "Clear" thaum koj xav tau rov pib dua los ntawm nruab nrab ntawm kev suav.
Kauj Ruam 8. Nias "Backspace," "Rho tawm," lossis "CE" kom tshem tus lej kawg
Yog tias koj xav kom tshem tus lej kawg ntawm koj lub vijtsam yam tsis tau so tag nrho cov kab zauv tawm, ntaus "Backspace" lossis "Rho tawm" khawm. Piv txwv, hais tias koj ntaus "4," "x," "2," tab sis xav nias "4," "x," "3." Nias "Rho tawm" kom tshem "2" thiab tom qab ntawd nias "3" thiab koj yuav tsum pom "4 x 3" ntawm cov zaub.
- Lub pob "CE" sawv cev rau "Kev Nkag Mus Nkag Siab."
- Yog tias koj nias "Clear" hloov "Backspace" lossis "Delete," koj qhov sib npaug yuav rov pib dua rau "0."
Kauj ruam 9. Nyem rau"
khawm los tsim cov lej zauv.
Pib los ntawm nias tus lej ua ntej tus lej, tsoo lub "." khawm, nias tus lej tom qab tus lej, thiab tom qab ntawd nias lub pob "=". Piv txwv, los tsim "50.6," ntaus "5," "0," ".," "6," thiab tom qab ntawd "=."
- Yog tias koj ntxiv, rho tawm, sib npaug, lossis faib tom qab koj tsim koj tus lej lej, koj tsis tas yuav ntaus "=."
- Siv cov "+," "-," "x," thiab "÷" cov nyees khawm ntxiv, rho tawm, sib npaug, thiab faib cov zauv zauv, feem.
Kauj Ruam 10. Hloov cov lej rau hauv feem pua nrog lub pob "%"
Ntaus "%" khawm kom faib tus lej ntawm koj lub vijtsam los ntawm 100, uas hloov nws mus rau ib feem pua. Piv txwv li, yog tias koj xav paub tias 7 feem pua ntawm 20 yog dab tsi, pib los ntawm kev ntaus "7" tom qab "%" kom tau 0.07. Tam sim no, ntaus "x" ces "20" txhawm rau muab qhov feem pua-0.07-los ntawm 20, uas muab koj cov lus teb rau koj: "1.4."
Txhawm rau tig ib feem pua rov qab rau hauv tus lej, muab nws suav nrog 100. Hauv qhov piv txwv kawg, koj ntaus "7" thiab "%" kom tau 0.07. Tam sim no, ntaus "x" thiab tom qab ntawd "100" txhawm rau sib npaug nws 100 thiab tau txais tus lej qub: "7."
Kauj Ruam 11. Tsim cov feem me me uas siv cov khawm khawm thiab cov lej faib
Yog tias koj nyob hauv Asmeskas, cov kab ntawv hu ua niam txiv. Ib txwm pib nrog tus lej sab laug, "(" ua raws tus lej, uas yog tus lej saum toj kab. Tam sim no, nyem "÷" lossis "/" qhov tseem ceeb thiab tom qab ntawv xaus ")." Piv txwv, "5/6" yog ua los ntawm kev ntaus "(," "5," "/," "6," thiab tom qab ntawd ").
Siv cov "+," "-," "x," thiab "÷" cov nyees khawm ntxiv, rho tawm, sib npaug, thiab faib ua feem feem. Tsuas yog tsis txhob hnov qab muab cov kab zauv nyob ib ncig ntawm txhua feem lossis qhov kev suav yuav tawm
Kauj Ruam 12. Ntxiv thiab rho tawm ntawm lub laij lej lub cim xeeb ib ntus nrog cov yuam sij "M"
Cov "M+" thiab "M-" khawm ntxiv thiab rho tus lej ntawm koj lub vijtsam los ntawm lub laij lej lub cim xeeb ib ntus. Piv txwv li, ntaus "5" thiab tom qab ntawd "M+" ntxiv 5 rau qhov chaw khaws khoom no. Tam sim no, ntaus "5" dua thiab nias "M-" thiab koj yuav tshem nws.
- Kev khaws cia ib ntus tsis cuam tshuam los ntawm "Clear" lossis "Backspace" nyees khawm.
- Yog tias koj xav rov pib dua lub laij lej lub cim xeeb ib ntus, nias "MC."
- Siv qhov chaw cia ib ntus los ua cov lus teb yooj yim ntawm qhov nyuaj dua.
Txoj Kev 2 ntawm 2: Siv Kev Tshawb Fawb Txog Kev Tshawb Fawb
Kauj Ruam 1. Tsim tus lej inverse los ntawm nias "1/x" lossis "x^-1
"Kuj tseem paub tias yog tus yuam sij thim rov qab, qhov no muab rau koj sib luag ntawm txhua tus lej, uas yog sib npaug rau 1 faib los ntawm tus lej. txhais tau tias koj tuaj yeem ntaus "2" thiab tom qab ntawd "1/x" los muab koj cov lus teb ntawm 1/2 (0.5 hauv daim ntawv zauv).
Muab tus lej los ntawm nws qhov sib thooj yog ib txwm sib npaug rau 1
Kauj Ruam 2. Nrhiav lub xwmfab ntawm tus lej los ntawm nias "X^2" lossis "yx
"Cov xwm txheej ntawm tus lej tau txais los ntawm kev muab tus lej los ntawm nws tus kheej. Piv txwv li, lub xwmfab ntawm 2 yog" 2 x 2, "uas yog 4. Yog tias koj nias" 2 "rau hauv lub laij lej thiab ntaus" X^2 "lossis "yx," cov lus teb yog "4."
Qhov haujlwm thib ob ntawm lub xwmfab khawm feem ntau yog "√," uas yog lub hauv paus cag. Lub hauv paus square yog tus nqi uas tig lub xwmfab (xws li 4) rau hauv nws lub hauv paus (hauv qhov no 2). Piv txwv, lub hauv paus plaub ntawm 4 yog 2, yog li nias "4" thiab tom qab ntawd "√" muab lus teb kawg rau koj ntawm "2."
Kauj Ruam 3. Xam lub zeem muag ntawm tus lej los ntawm nias "^," "x^y," lossis "yX
"Lub zeem muag (lossis lub zog) ntawm tus lej hais txog pes tsawg zaus nws tau sib tw los ntawm nws tus kheej. Tus lej cim tus lej yuav siv thawj tus lej (x) thiab sib npaug nws los ntawm nws tus kheej lub sijhawm tshwj xeeb raws li tau txiav txim los ntawm" y. "Piv txwv li, "2^6" yog 2 rau lub zog ntawm 6, uas yog sib npaug "2 x 2 x 2 x 2 x 2 x 2." Qhov no tuaj yeem suav nrog khawm lub zog siv qhov kev txiav txim ntawm kev ua haujlwm: nias "2," nias "x^y," nias "6," thiab nias "=." Cov lus teb kawg yog "64."
- Txhua tus lej (x) rau lub zog ntawm 2 hu ua x sib npaug, thaum tus lej (x) rau lub zog ntawm 3 hu ua x cubed.
- Qhov "^" tus lej feem ntau pom ntawm cov lej lej thaum lub "x^y" thiab "yX" cov yuam sij tau pom ntawm cov lej laij lej.
Kauj Ruam 4. Xam cov cim cim cim siv "EE" lossis "EXP" khawm
Cov ntawv sau tshawb fawb yog ib txoj hauv kev qhia cov lej loj-xws li 0.0000000057-hauv txoj hauv kev yooj yim dua. Hauv qhov no, qhov kev tshawb fawb yog 5.7 x 10-9. Txhawm rau tig tus lej rau hauv cov cim kev tshawb fawb, nkag mus rau tus lej lej (5.7) thiab tom qab ntawd nyem "EXP." Tam sim no, nias tus lej piav qhia (9), "-" qhov tseem ceeb, thiab tom qab ntawd ntaus "=."
- Tsis txhob ntaus tus lej (x) tom qab tsoo "EE" lossis "EXP."
- Siv lub pob "+/-" txhawm rau hloov lub cim ntawm tus lej nthuav tawm.
Kauj Ruam 5. Siv koj lub laij lej rau trigonometry nrog cov "kev txhaum," "cos," thiab "ziab" khawm
Txhawm rau nrhiav qhov sine, cosine, lossis tangent ntawm lub kaum sab xis, pib los ntawm kev nkag mus rau tus nqi kaum hauv qib. Tam sim no, nyem "sin", "cos," lossis "tan" khawm kom tau txais sine, cosine, lossis tangent, feem.
- Txhawm rau hloov lub sine rau hauv lub kaum ntse ntse, nias tus nqi sine thiab tom qab ntawd ntaus "sin-1" lossis "arcsin."
- Yog tias koj xav tig lub kaum sab xis cosine lossis tangent rau hauv lub kaum sab xis, nyem qhov cosine lossis tangent tus nqi thiab tom qab ntawd nias "cos-1" lossis "arccos."
- Yog tias koj lub laij lej tsis muaj "arcsin," "sin-1," "arccos," lossis "cos-1" cov nyees khawm, ntaus "ua haujlwm" lossis "hloov" yuam sij thiab tom qab ntawd nias tus qauv "ua txhaum" lossis "cos" "khawm kom tig lawv qhov txiaj ntsig rau hauv cov ces kaum.
