Module6:Placevalue,Comparison,Additionandsubtractionto100

MATHTODAY

Grade1,Module6,TopicC

1stGradeMath

Module6:PlaceValue,Comparison,AdditionandSubtractionto100

MathParentLetter

Thisdocumentiscreatedtogiveparentsandstudents a better understandingofthemathconceptsfoundinthe EngageNewYorkmaterialwhichistaughtinthe classroom.Module6ofEngageNewYorkcoversPlace Value,Comparison,AdditionandSubtractionto100.

Thisnewsletter willdiscussModule6,TopicC.

TopicC.Additionto100UsingPlaceValueUnderstanding

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FocusArea–TopicC

Additionto100UsingPlaceValueUnderstanding

Solve.

64isdecomposedto4and 60.Addthe tenstogether:60+30=90.Add theonesto thetotal:90+4=94.

36isdecomposedto6

and30.Ican make10

byadding64+6=70.

70+30=100

10tens-

3tens=

7tens

QuickTenDrawing

The fourlines represents4 tens,the ninedots represents9ones.4tens9ones= 49.Draw thetens andonesfor 35

100–30=70

below the tensandonesthat represent 49. Rememberto lineupthevalues. Circlethegroupsof10intheones,thenwritethenumberfromeachbelow.

Recordthenewtenbelow.(problemabove)Writetheproblemvertically.

Addtheonestogether,9+5=14

(1ten4ones) writethe4intheonescolumnandwritea1underthe3inthetenscolumn.(Thismaymakeiteasierforstudentstoremembertoaddthattenintothesolution).Addthetenstogether,4+3+1=8tens

Write the8belowthetenscolumn. 8tens4ones.49+35=84