IXL | Subtract decimal numbers using blocks

The blocks show 9.07. Use them to find

9.07

–

4.03

How will you need to regroup to find

9.07

–

4.03

Regroup 1 tenth as 10 hundredths only.

Regroup 1 one as 10 tenths only.

Regroup 1 tenth as 10 hundredths and regroup 1 one as 10 tenths.

No regrouping is needed.

Subtract.

9.07

–

4.03

ref_doc_title.

Learn with an example

question

The blocks show 2.87. Use them to find

2.87

–

1.64

How will you need to regroup to find

2.87

–

1.64

Regroup 1 tenth as 10 hundredths only.

Regroup 1 one as 10 tenths only.

Regroup 1 tenth as 10 hundredths and regroup 1 one as 10 tenths.

No regrouping is needed.

Subtract.

2.87

–

1.64

solution

You can use the blocks to help you find

2.87

–

1.64

The blocks show 2.87.

ones

tenths

hundredths

To subtract 1.64, take away 1 one, 6 tenths, and 4 hundredths.

You can take away 4 hundredths from 7 hundredths. So, do not regroup 1 tenth as 10

hundredths.

You can take away 6 tenths from 8 tenths. So, do not regroup 1 one as 10

tenths.

Now, you can take away 1 one, 6 tenths, and 4 hundredths.

2
ones
–
1
one
=
1
one
8
tenths
–
6
tenths
=
2
tenths
7
hundredths
–
4
hundredths
=
3
hundredths

one

tenths

hundredths

There is 1 one, 2 tenths, and 3 hundredths left. That is the same as 1.23.

2.87

–

1.64

1.23

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Teacher tools

Work it out

Not feeling ready yet? These can help:

W.2Place value models for decimal numbers

E.3Subtract two multi-digit numbers

AA.1Add decimal numbers using blocks

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