Subtracting decimals within 1

1 Workoutthesubtractions.

Usethenumberlinestohelpyou.

a) 0.9–0.2=

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

b) 0.8–0.1=

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

c) 1–0.2–0.1=

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Whatdoyounoticeaboutyouranswers?

2 Completethepart-wholemodels.

a) c)

b) d)

3 Completethesubtractions.

Usetheplacevaluechartstohelpyou.Thefirstonehasbeen

startedforyou.

a) 0.42–0.3=

Ones Tenths Hundredths

b) 0.28–0.05=

Ones Tenths Hundredths

©WhiteRoseMaths2020

0.6

0.3

0.09

0.03

0.7

0.3

0.005

0.004

©WhiteRoseMaths2020

4 Usethecolumnmethodtoworkoutthesubtractions.

a) c)

b) d)

5

DoyouagreewithEva?

Workouttheanswerto0.56–0.099

6 Findthedifferencebetween53hundredthsand8tenths.

Giveyouranswerasadecimal.

Thedifferencebetween53hundredthsand8tenthsis

7 Apieceofwoodis0.9metreslong.

Itiscutinto3unequalpieces.

Thefirstpieceis0.2metreslongerthanthesecondpiece.

Thethirdpieceis23hundredthsofametreshorterthanthe

secondpiece.

Howlongiseachpieceofwood?

1st= 2nd= 3rd=

I can’t work out 0.56 – 0.099 because 99 is bigger than 56

0 8 9

– 0 4

0 7 7

– 0 6 8

0 7

– 0 2 5

0 7 7

– 0 6 4

1st

2nd

3rd