IXL | Subtract decimal numbers using blocks

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

ref_doc_title.

Learn with an example

question

The blocks show 5.13. Use them to find

5.13

–

1.12

How will you need to regroup to find

5.13

–

1.12

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.

5.13

–

1.12

solution

You can use the blocks to help you find

5.13

–

1.12

The blocks show 5.13.

ones

tenth

hundredths

To subtract 1.12, take away 1 one, 1 tenth, and 2 hundredths.

You can take away 2 hundredths from 3 hundredths. So, do not regroup 1 tenth as 10

hundredths.

You can take away 1 tenth from 1 tenth. So, do not regroup 1 one as 10

tenths.

Now, you can take away 1 one, 1 tenth, and 2 hundredths.

5
ones
–
1
one
=
4
ones
1
tenth
–
1
tenth
=
0
tenths
3
hundredths
–
2
hundredths
=
1
hundredth

ones

tenths

hundredth

There are 4 ones, 0 tenths, and 1 hundredth left. That is the same as 4.01.

5.13

–

1.12

4.01

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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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