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RelatingMultiplicationand Division

Teaching Point: Studentswill be able to solve divisionproblems by relating themto multiplication facts.

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Prior Knowledge

9  + -

  5 4

 ___ + ___ = ___ + ___ = ___ - ___ = ___ - ___ =

Fact Famil!Fact families are " numbers t#atare related$ %ust as t#e people in afamily are related& '#ose num(erscan (e com(ined to create a num(er

o) e*uations&

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#at does it mean to divide, Division is splitting into e*ual parts or groups& t is t#e result o) .)air s#aring.&

  /0 c#ocolates /0 c#ocolates divided into " groups

 ____ ÷ ____ =____ 

Vocabulary:

nverse operation! 1pposite operations t#at #ave opposite e2ects$ suc# asaddition and su(traction$ or multiplication and division&3ommutative propert! Re)ers to moving stu2 around& ample "65=/556"=/5

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7icole #as 04 (eads& 8#e is maing 4 (racelets$ all wit# t#e same

num(er o) (eads& :ow man (eads s#ould eac# (racelet #ave,

#at are t#e)acts,

 7icole #as04 (eads$

s#e ismaing 4

(racelets&

#at are t#easing us,

:ow man (eadss#ould eac#

(racelet #ave,

:ow could wesolve t#epro(lem,

 '#in a(out

s#aring& Put 04(eads into 4e*ual groups&

#at do we now, ;Fact Famil<

nverse operation

 4 6 ____ = 04 ____6 4 = 04 '#in o) t#e multipleso) 4! 4$ $ /0$ />$ 0?$04

 

4 04

ample @

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7icole #as 04 (eads& 8#e is maing 4 (racelets$ all wit# t#e same

num(er o) (eads& :ow man (eads s#ould eac# (racelet #ave,

#at are t#e)acts,

 7icole #as 04(eads$ s#e is

maing 4(racelets&

#at are t#easing us,

:ow man(eads s#ould

eac# (racelet#ave,

:ow could wesolve t#epro(lem,

 '#in a(out

s#aring& Put 04(eads into 4e*ual groups&

ample @

#at to write!

#at do wenow, ;Fact Famil<

 '#in o) t#e

multiples o) 4!4$ $ /0$ />$ 0?$044 6 > = 04

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Relating Multiplication andDivision

Multiplication and division are related$ %ust lie addition and su(traction are

related&  '#e inverse operation o) multiplication is division& 

÷ 6 

 ___6___ = ___  ___6___ = ___  ___ ÷ ___ = ___  ___ ÷ ___ = ___ 

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FroAen Fact Famil

8tep /! Bse a triangle )or a cone&8tep 0! Bse 4 circles )or t#e scoop o) ice cream&

8tep "! Paste t#em onto t#e w#ite paper&8tep 4! '#in o) a multiplication e*uation ;num(ersentence<e! C 6 5 = "5 5 6 C = "5

 '#in o) an two num(ers under /0 and multipl t#em&

  C 5

  "5

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:ow did ou discover w#ic# )act Et intot#e )amil, #at strategies did ou use,