Peb feem ntau tsis nco qab tias peb tau kawm hauv tsev kawm ntawv thiab kawm ib qho khoom siv thiab lub cev ntawm lawv ntsuas. Ntau tus tsis txawm paub: muaj pes tsawg milligrams nyob hauv ib lub gram, thiab hloov ua lwm yam.
Vim li cas qhov no thiaj tseem ceeb?
Cia peb pib nkag siab: qhov twg nws tsim nyog paub (yam tsis swb), thiab muaj ib hnub twg txoj kev paub txog grams thiab milligrams tuaj yeem yooj yim rau hauv peb lub neej.
Tshuaj thiab kev lag luam
Yog tsis muaj cov kev paub no, tsuas yog ua tsis tau yog tias nws los txog rau kev kho mob cov tshuaj, kev lag luam thiab tshuaj pleev ib ce. Ntxiv mus, yog tias peb tham txog tshuaj, ces tsis muaj txoj hauv kev los hais txog qhov ntau. Tom qab tag nrho, lub neej ntawm lab ntawm tib neeg nyob ntawm qhov no! Tib yam muaj tseeb hauv kev lag luam uas qhov kev txiav txim siab tseem ceeb. Xav txog yog tias ib tus neeg ua haujlwm ntawm lub tsev ua haujlwm caj npab tsis paub: muaj pes tsawg milligrams ntawm ib rab phom phom. Nws yog qhov txaus ntshai txawm tias kev xav txog dab tsi yuav tshwm sim vim tsis muaj kev paub txog kev siv grams thiab milligrams.
Hauv cov tshuaj, vim yog ib qho yuam kev hauv cov feem ntawm cov tshuaj, cov tshuaj muaj peev xwm dhau los ua cov tshuaj lom neeg tuag taus, txawm tias ib nrab milligram hloov tawm los ua superfluous lossis tsis txaus!
Hmoov tsis zoo, muaj ntau dua thiab ntau dua cov neeg niaj hnub uas tsis paub txog kev hloov dua siab tshiab (txhais lus) ntawm cov khoom siv lub cev. Tej zaum, nws tsis yog qhov zais cia ntxiv uas cov neeg zoo li no tuaj yeem nkag rau hauv thiab tau poob rau hauv kev kho mob lossis chaw ua haujlwm, qhov twg tsis tuaj yeem ua yog tsis muaj nws. Kuj tseem muaj cov neeg ntseeg siab: "Hauv ib gram ib puas milligrams." Qhov no siv tsis tau rau sawv daws xwb, tab sis kuj paub txog lwm yam thiab. Thiab leej twg paub lawv ua haujlwm qhov twg? Xws li tsis yog fraught nrog kev xwm txheej thiab kev puas tsuaj.
Hauv cov txheej txheem SI, tsuas siv phaus nkaus xwb yog siv rau cov nyiaj suav. Txawm tias ib feem tsawg ntawm cov huab hwm coj hloov pauv mus rau kg. Piv txwv li, 123 grams yuav tsum sau cia li 0.123 kg.
Ua tsaug rau cov tib neeg uas tsis tshua paub txhais lus ntawm kev ntsuas ntawm kev ntsuas ntawm lub cev, peb muaj sia nyob thiab muaj lub sijhawm los kho kab mob, siv lwm yam tshuaj los ua kom peb lub neej yooj yim. Piv txwv, cov kws muag tshuaj yeej muaj peev xwm muab tshuaj kom raug. Cov kws kho tshuaj uas tsim tshuaj tua kab thiab chiv tau txais tshuaj zoo kom cov qoob loo zoo thiab kab tsuag tsis ua rau cov qoob loo puas. Zoo, lawv, zoo li tsis muaj lwm tus, paub: ntau npaum li cas mg rau 1 gram.
Lub neej muaj xwm txheej
Tej zaum, koj feem ntau tau hnov los ntawm cov menyuam yaus hauv tsev kawm ntawv, piv txwv li cov lus no: "Vim li cas kuv thiaj xav paub qhov no? Kuv yuav yog tub ceev xwm, tab sis qhov no yuav tsis los ntawm tes hauv kuv lub neej!" Qhov tseeb, nws tseem muaj txiaj ntsig zoo.
Cia li xav hais tias koj yuav tsum muab ib tug pog laus kho kom zoo. Cov lus qhia tau hais tias koj yuav tsum tau noj 250 mg ib hnub ob zaug. 250, tsis muaj ntxiv thiab tsis muaj tsawg! Txwv tsis pub, cov tshuaj yuav pib ua haujlwm tsis raug, ua rau muaj kev phiv, lossis, txhua lub sijhawm, kev siv tshuaj ntau dhau. Ntawm lub thawv nrog cov ntsiav tshuaj sau tias: "Hauv pob ntawm 50 ntsiav tshuaj, 1 g ntawm yam khoom tseem ceeb." Cov lus qhia tsis sau hais tias nws yog qhov yuav tsum tau tawg lub ntsiav tshuaj ua plaub ntu, tab sis sau tias lawv noj 250 milligrams. Raws li koj tuaj yeem pom, koj yuav tsum paub: muaj pes tsawg milligrams nyob hauv ib gram.
Los yog, cov teeb meem nrog cov chiv, uas qee zaum ntim hauv ob peb grams. Piv txwv li, ib lub hnab ntim ib qho ntawm hmoov. Txhawm rau txhawm rau hais, ib qho paj hauv tsev, koj yuav tsum tau dilute 500 milligrams hauv 200 millilitic dej. Ib zaug ntxiv, lawv tsis tau sau tias ib nrab ntawm lub hnab yuav tsum tau diluted, uas yog 500 mg.
Kev tua tsiaj, tib rooj plaub ntawm rab phom. Peb yuav los nrog qhov xwm txheej. Ib tug neeg tsis yuav cov khoom lag luam npaj tsim, tab sis yuav tsub lawv tus kheej. Nqa phom hnyav li 1 kg. Koj yuav tsum tau hliv rau hauv lub taub hau, piv txwv li, 2.25 g. Nws muaj cov nplai raug, uas tau qhia tsuas yog milligrams. Nws zaum thiab xav hais tias: "Dab tsi yuav tsum tau milligram nplai qhia kuv kom kuv tau muab 2,25 gram rau hauv lub tawb?" Nws yog qhov tsim nyog kom paub tias yuav tsum muaj qhov phom sij ntawm ntau rab phom me me yuav tsum yog 2250 milligrams ntawm nws cov nplai. Tau kawg, koj tuaj yeem siv cov phiaj xwm tshwj xeeb.
Cov xwm txheej zoo li no tuaj yeem raug suav ua piv txwv tsis muaj qhov kawg. Tsuas muaj ib qho xaus los ntawm qhov no: koj puas ua haujlwm ntawm thaj chaw kev lag luam lossis tsis, tab sis koj yuav tsum muaj kev paub txog cov kev ntsuas ntawm kev ntsuas ntawm cov khoom hauv koj lub taub hau. Tseem siv nyog lawm.
Yuav ua li cas los xam
Tam sim no cia peb xam: pes tsawg mg rau 1 gram thiab hloov ua lwm yam. Ua ntej tshaj plaws, nws tsim nyog nco ntsoov tias nyob hauv ib hom muaj li 1000 milligrams. Thiab 1 milligram yog ib txhiab ntawm ib qho. Ntawd yog, 1 mg yog 0.001 g thiab 1 g yog 1000 mg.
Qhov loj tshaj plaws yog kom tsis txhob ua qhov tsis yog nrog xoom xaim thiab hloov kho lub chaw tus lej zauv (comma):
- 1 gram = 1000 milligrams;
- 10 grams = 10,000 milligrams;
- 5 milligrams = 0.005 grams;
- 50 milligrams = 0.05 grams;
- 500 milligrams = 0.5 (ib nrab) grams.
Tam sim no peb paub ntau npaum li cas milligrams yuav yog 1 gram. Thiab yog tias ntawm qhov tsis sib xws, tom qab ntawd peb yuav tsum nrog daws cov lej feem. Ib xoom yog lub comma hloov ntaub ntawv los ntawm ib lub cim. Yog tias peb xav sau 1 milligram ua grams, peb tau txais 0.001.
1 milligram yog ib txhiab ntawm ib hom. 1 tau muab faib los ntawm ib txhiab, uas yog, peb tsiv lub suab rau sab laug los ntawm peb tus lej, vim tias muaj peb lub xoom hauv ib txhiab. 10 milligrams - ib puas ntawm ib lub gram (rau ob tus lej). 100 milligrams - ib feem kaum (ib daim paib).
Piv txwv li, koj muaj 24 milligrams. Hauv grams, nws zoo li qhov no: 0.024 g. 24 faib ua ib txhiab. Yog tias los ntawm grams txog milligrams, tom qab ntawd tus lej zaws ntxiv raws ntau yam. 356 grams yog 356,000 mg.
Nws yooj yim dua los ua haujlwm nrog kev hloov chaw. Yog li ntawd sai, thiab koj yuav tsis yuam kev ib zaug.
