Weekly Maths

27-4-2020

LI:Tousethecolumnmethodtosubtractdecimalsinthecontextoftakingawayorfindingthedifference-includingexampleswhereanexchangeisrequired.StepstoSuccess:•  Lineupthedecimalpointsunderneatheachother•  Makesuretheones,tenthsandhundredthsareinthe

correctcolumns.•  Beclearifyouareaddingorsubtrac=ng

DayOne

Fluencywarm-up:WriteoutthesecalculaFonsascolumns-rememberingtolineupthedecimalpoints.

2.64+4.73=, 5.48–0.38=, 3.69+3.99=, 4.92–3.07=

2.644.73+

Forexample-noFcewherethedecimalpointsarelinedup,alltheonesinthesamecolumnandallthetenthsandhundredthsintheircolumns.

3.693.99+

4.923.07-

2.644.73+

5.480.38-

Answers:

What is the Golden rule when adding

or subtracting numbers?

(Place Value columns…)

Howdidyoulayoutyourwork?

Whichisquicker–tocountonfrom£5.74upto£6.00,ortosetoutacolumnsubtracFon?Alwayschoosethequickestandeasiestmethod.

Choosethequickestandeasiestmethod…Thisques=onneedstobecompletedusingacolumnmethod.

AndnowsomemuchtrickierquesFons…

Yourturnnow.HaveagoatthefollowingquesFons:

Ifyouareupforachallenge,thentryquesFon7!

Plenary:

Showmesomenumbersentencesaswellandwriteanexplana=on.

DayTwo

28-4-2020LI:Toaddandsubtractdecimalswithadifferentnumberofdecimalplaces.(ThisincludesexampleswhereanexchangeisrequiredoryoumustidenFfythemistakeinacalculaFon.)StepstoSuccess:•  Lineupthedecimalpointsunderneatheachother•  Makesuretheones,tenthsandhundredthsareinthecorrectcolumns.•  Writeinanyextra0asplaceholderstomakeiteasiertoknowwhichnumbers

youareaddingorsubtrac=ng•  Beclearifyouareaddingorsubtrac=ng

Fluencywarm-up:Add0asaplaceholder(withoutchangingthevalueofthenumber)tomakeiteasiertoknowwhichdigitsyouareaddingorsubtracFng.

Forexample:2.4+5.86=becomes (Added0asplaceholder)

2.405.86+

3.8–2.58=, 8.07+3.2=, 5.79–3.104=, 6.4+6.004=

3.802.58- 8.073.20+

5.7903.104-6.4006.004+

Answers:

WhichquesFonareyouaddingandwhichareyousubtracFngtofindtheanswers?

Date Didyousetoutyoudigitswiththedecimalpointslinedupunderneatheachother?Didyouremembertoexchangeinpartb?

Date Don’tforgettocheckthescaleontheruler-itstartsat3m…

NoFcehowanextra0isaddedheretohelpkeepthedigitsintheircorrectplacevaluecolumnsandmakeiteasiertoadd.

Date Remembertoaddextra0tofilltheemptyspacesandhelpyoutocorrectlyaddupthesenumbers.

YourTurn:

Haveyoufollowedthestepstosuccess?

QuesFon8istricky!Iwonderwhowillfindthemostanswers?

Plenary:

Answers:Howdidyoudo?

DayThree

29-4-2020LI:Toaddandsubtractdecimalnumberswithupto4digitsfromwholenumbers(andexchangewhentherearezerosinthecolumns).StepstoSuccess:•  Alwayslinethedigitsupinplacevalueorder•  Alwaysline-upthedecimalpointsunderneath•  Include0asaplaceholdertomakesureeachnumber

hasthesamenumberofdigits

Fluencywarm-up:CompletethesecalculaFons

3.7+2.97=4.29–2.1=45.9+13.68=

3.702.97+6.674.292.10-2.1945.9013.68+59.58

Answers:

Howwillyouwritethedecimalssothattheyareeasytocalculatewith?(makesuretheyallhavethesamenumberofdecimalplacesbyusing0asaplaceholder)

NoFcetheplaceholderzerosaddedhere.Howdotheimagesherehelpyoutounderstandthemaths?

RemembertowritethecorrectunitstomatchthequesFon.

YouwillhavetotryarangeofdifferentcalculaFonstosolveQ2.Whichmethoddoyouprefer?Whyisthat?

YourTurn!

Howwillyouwrite8asadecimalwith0asplaceholders.

Plenary:

Answers

30-4-2020LI:Touseknowledgeofdecimalnumberstocountandcompletedecimalsequences,(describetherulethatthesequencefollowsanduseittocalculatemissingterms.)StepstoSuccess:

DayFour

Fluencywarm-up:

Completetwomoretermsineachofthesesequencesandrecordwhattheruleistoworkoutthesesequences.

a)  2,4,8,16,32,_____,_____

b)  1,3,9,27,_____,______

c)  80,65,50,35,_____,______

d)  4.5,5.0,5.5,6.0,_____,_____

a) 2,4,8,16,32,64,128doublethepreviousnumber

b) 1,3,9,27,81,243triplethepreviousnumber

c) 80,65,50,35,20,5takeaway15

d) 4.5,5.0,5.5,6.0,6.5,7.0addon0.5

Answers

Trymakingalistofallthenumbers.Howcouldyoupresentthislist?

Didyourlistlookmorelikethetableormorelikethenumberline?

ThisquesFonhasthetablealreadydrawnforyoutocomplete.Don’tforgettowritetherule!

Don’tforgettowritetherules!

YourTurn:

Plenary:

Answers:

1-5-2020LI:TolearnstrategiesforsolvingproblemsinvolvingaddingandsubtracFngnumberswithuptothreedecimalplaces.StepstoSuccess:•  Writeanumbersentencetomatcheachques=on•  Makesureyouareclearwhethertheques=onisaddi=on

orsubtrac=on.•  Includeplaceholderzerostohelpyousetoutthecolumn

addi=onorsubtrac=onaccurately

DayFive

Fluencywarm-up:

PleaselogintoyourRockStarsTimesTableaccountandpracFceyourtablesfor10minutes.

ReadthequesFoncarefullyandwriteanumbersentenceforeachquesFon.

a) Mynumbersentencewouldbe:76.8kg-12.75kg

(Notetheuseoftheplaceholderzero…)b)Mynumbersentenceswouldbe:•  90.2kg+49.89kgand•  theanswertotheabovequesFon+49.89kg

WritethenumbersentencestomatcheachquesFon.Doyouneedtoincludeanyzerosasplaceholders?

Whatmightyourbarmodellooklike?HowwouldthishelpyoutoanswerthequesFons?

YourTurn

Remembertomakeallthenumbersmatchwiththesamenumberofdigitsbyincludingplacevalueholders.

Plenary:

Answers:

Howdidyougetonthisweek?IfyouwantsomemorepracFcethenlogintoPurpleMashandworkthroughthedecimalsunitintheMathssecFon.(Someofyouhavealreadyhadagoatsomeofthese.)