subtract mixed numbers 2 dexter’s method...subtract mixed numbers 1 complete the subtractions. use...

Subtract mixed numbers

1 Completethesubtractions.

Usethebarmodelstohelpyou.

a)

158

– 12

=

b)

178

– 34

=

c)

112

– 38

=

2 DexterandWhitneyareusingnumberlinestoworkout156

− 13

Dexter’s method

Whitney’s method

Whatisthesameandwhatisdifferentaboutthesemethods?

Useoneofthemethodstoworkout158

– 316

158

316

158

– 316=

©WhiteRoseMaths2019

26

1 26

1 56

+1 + 36

1 + 36 = 1 1

2 13 = 26

13

1 1 56

+ 23

+ 56

46 + 5

6 + 96 =1 1

2 23 =

46

©WhiteRoseMaths2019

3 Completethesubtractions.

a) 314

– 524= d) 7

56

– 1324=

b) 3316– 1

8= e) 449

– 427=

c) 256

– 23= f) 6

1112

– 34=

4 Ajugcontains135

litresoforangejuice.

Evapours 415

litresintoaglass.

Howmuchorangejuiceisleftinthejug?

Thereare litresoforangejuiceleftinthejug.

5 Findthreedifferentwaystocompletethecalculation.

3 5–

20=31

20 3 5–

20=31

20

3 5–

20=31

20

Arethereanyotherwaystocompletethiscalculation?

6 Threechildrentakepartinthrowingcompetitions.

Hereisthetableofresults.

Javelin ShotPut Discus

Dexter 1514m 7

5

12m

Amir 1338m 12

78m

Annie 9m 115

12m

Usethecluestocompletethetable.

• Annie’sjavelinthrowis1112

mlessthanDexter’s.

• Amir’sshotputthrowis 34

mlessthanAnnie’s.

• Dexter’sdiscusthrowis 12

mlessthanAmir’s