2025 Henke’s Med-Math Dosage Calculation Test Bank – Nursing & Pharmacy Prep

,
,Chapterl1:lArithmeticlNeededlforlDosage


MULTIPLElCHOICE

1. Alpatient/clientlwaslinstructedltoldrinkl25lozloflwaterlwithinl2lhourslbutlwaslonlylableltoldrinkl15loz.lWh
atlportionloflthelwaterlremained?
a. 2/5
b. 3/5
c. 2/25
d. 25/25
ANS:l A
Feedback:lSubtractlthelquantityloflwaterlthelclientldrankl(15loz)lfromltheltotallavailablelquantityl(25loz):
l10lozlremain.lToldeterminelthelportionloflthelwaterlthatlremains,lcreatelalfractionlbyldividingl10lozl(rem
aininglportion)lbyl25lozl(totallportion).lTherefore,l10ldividedlbyl25l=l10/25.lTolreducelfractions,lfindlth
ellargestlnumberlthatlcanlbeldividedlevenlylintolthelnumeratorlandltheldenominator
(5).lTenldividedlbyl5l(10/5)l=l2;l25/5l=l5.lThelfractionl10/25lcanlbelreducedltolitsllowestltermslofl2/5.

Format:lMultiplelChoicelChapte
r:l1
ClientlNeeds:lPhysiologicallIntegrity:lBasiclCarelandlComfortlCog
nitivelLevel:lApply
Difficulty:lModerate
PagelandlHeader:l2,lDividinglWholelNumbers;l3,lFractionslIntegrat
edlProcess:lTeaching/Learning
Objective:l1,l2

2. Alpatient/clientlwaslprescribedl240 W
mWLWo.
flETnB
suSreMb.yWmSouthlaslalsupplementlbutlconsumedlonlyl100lm
L.lWhatlportionloflthelEnsurelremained?
a. 5/12
b. 7/12
c. 100/240
d. 240/240
ANS:l B
Feedback:lSubtractlthelquantityloflEnsurelthelclientlconsumedl(100lmL)lfromltheltotallavailablelquantit
yl(240lmL):l140lmLlremain.lToldeterminelthelportionloflthelEnsurelthatlremains,lcreatelalfractionlbyldiv
idingl140lmLl(remaininglportion)lbyl240lmLl(totallportion).lTherefore,l140ldividedlbyl240l=l7/12.lTolre
ducelfractions,lfindlthellargestlnumberlthatlcanlbeldividedlevenlylintolthelnumeratorlandltheldenominator
l(20);l140ldividedlbyl20l(140/20)l=l7;l240/20l=l12.lThelfractionl140/240lcanlbelreducedltolitsllowestlter
mslofl7/12.

Format:lMultiplelChoicelChapte
r:l1
ClientlNeeds:lPhysiologicallIntegrity:lBasiclCarelandlComfortlCog
nitivelLevel:lApply
Difficulty:lModerate
PagelandlHeader:l2,lDividinglWholelNumbers;l3,lFractionslIntegrat
edlProcess:lTeaching/Learning
Objective:l1,l2




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, 3. Alpatient/clientlconsumedl l oz.loflcoffee,l2/3loz.loflicelcream,landl

l oz.loflbeeflbroth.lWhatlisltheltotallnumberloflounceslconsumedlthatlshouldlbeldocumentedlforlthelpatien
t/client?
a. 3l3/4
b. 4l5/12
c. 4l2/3
d. 4l4/9
ANS:l B
Feedback:lAddlthelamountloflounceslconsumed.lFirst,lchangelanylmixedlnumberltolalfractionlbylmultiply
inglthelwholelnumberlbyltheldenominatorlandlthenladdinglthatltotalltolthelnumerator.lForlthelcoffee,l4ll2l
=l8l+l1l=l9/4;lforlthelbeeflbroth,l2ll1
=l2l+l1l=l3/2.lThenladd:l9/4l+l2/3l(icelcream)l+l3/2.lWhenlfractionslhaveldifferentldenominators,lfindlthell
eastlcommonldenominatorl(LCD).lForl2,l3,landl4,lthelLCDl=
12.lRewriteleachlfractionlusinglthelLCD;ldividelthelLCDlbyltheldenominatorlofleachlfractionlandlthenlmul
tiplylthatlresultlbylthelnumeratorloflthelfraction.lThelnewlfractionsltolbeladdedlarel27/12l(coffee),l8/12l(ic
elcream),landl18/12l(beeflbroth).lAfterlconversionloflthelfractions,lthelnumeratorslareladdedltogetherlandl
thelfractionlislreducedltolthellowestlterms.

Format:lMultiplelChoicelChapte
r:l1
ClientlNeeds:lPhysiologicallIntegrity:lBasiclCarelandlComfortlCog
nitivelLevel:lAnalyze
Difficulty:lDifficult
PagelandlHeader:l2,lMultiplyinglWholelNumbers;l3,lFractionslInte
gratedlProcess:lCommunicationlandlDocumentationlObjective:l1,l
2
4. Alcoffeelcuplholdsl180lmL.lThelpatient/clientldrankl2?lcupsloflcoffee.lHowlmanylmilliliterslwould
thelnurseldocumentlaslconsumed? WWW.TBSM.WS
a. 360
b. 420
c. 510
d. 600
ANS:l B
Feedback:lThelcoffeelcuplholdsl180lmL.lThelclientldrankl2?lcups.lTolestimateltheltotallnumberloflmillilit
erslconsumed,lmultiplyl180ll7/3l(
).lWhenlalmixedlnumberlislpresent,lchangelitltolanlimproperlfractionlbylmultiplyinglthelwholelnumberlbyl
theldenominatorlandlthenladdinglthatltotallto
thelnumerator:l2ll3l=l6l+l1l=l7/3.lTherefore,l180lmLl×l7/3l=l420lmLl(180l÷l3l=l60l×l7l=l420).

Format:lMultiplelChoicelChapte
r:l1
ClientlNeeds:lPhysiologicallIntegrity:lBasiclCarelandlComfortlCog
nitivelLevel:lAnalyze
Difficulty:lDifficult
PagelandlHeader:l2,lMultiplyinglWholelNumbers;l3,lFractionslInte
gratedlProcess:lCommunicationlandlDocumentationlObjective:l1,l
2

5. Alpatient/clientlweighedl48.52lkglonladmissionlandlnowlweighsl50.4lkg.lHowlmanylkilogramslwerelga
inedlsinceladmission?
a. 0.78
b. 0.88


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