Fractions as operators
1 a) Workout 13
×6
13
×6=3
=
b) Workout 13
of6 6
13
of6= ÷ =
c) Whatisthesameaboutthesecalculations?
d) Workout 23
of6
23
of6= ÷ ×2=
e) Workout 23
×6
23
×6= =
2 Completethecalculations.
a) 13
×12= c) 12× 23
=
13
of12= 23
of12=
b) 12× 14
= d) 34
×12=
14
of12= 34
of12=
Whatdoyounotice?
3 Tickthecalculationineachpairthatiseasiertoworkout.
a) 15
×7 15
of7
b) 15
×10 15
of10
c) 35
×10 35
of10
d) 310×5 3
10of5
Compareanswerswithapartner.
©WhiteRoseMaths2019
©WhiteRoseMaths2019
4 Completethecalculations.
a) 56
×12= of12=
b) 34
×24= of24=
c) 27
× = of28=
d) ×45= 45
of =
5 Abarofchocolatehas5equalpieces.
Thewholebarweighs120g.
Howmuchdothreepiecesweigh?
a) Writetwocalculationsthatwillgivetheanswertotheproblem.
b) Workouttheanswer.
Threepiecesofchocolateweigh
6 TeddyandAnnieareworkingout 37
×42
a)
UseTeddy’smethodtoworkoutthecalculation.
b)
UseAnnie’smethodtoworkoutthecalculation.
c) Whosemethoddoyouprefer?
Explainwhy.
d) Whenisiteasiertofindfractionsofamountsratherthan
multiplyfractions?
Givesomeexamplesforeachmethod.
Annie
Teddy
I will find 37 of 42
I will multiply 42 by 37
120g