New
New
Read and write numbers with up to 3 decimal places
I can read and write numbers with up to 3 decimal places.
Lesson 8 of 10
New
New
- Year 5
Read and write numbers with up to 3 decimal places
I can read and write numbers with up to 3 decimal places.
Lesson details
Key learning points
- There are 10 one thousandths in one hundredth.
- There are 100 one thousandths in one tenth.
- There are 1,000 one thousandths in one whole.
- Thousandths are recorded in the third decimal place so one thousandth is 0.001
Keywords
Thousandth - One thousandth is one part in one thousand equal parts.
One thousandth the size - When a whole is divided into one thousand equal parts, we can say one of those parts is one thousandth the size of the whole.
Thousandths column - The thousandths column places the number of thousandths a given number has.
Millimetre - A millimetre is a measure of length that can be abbreviated as mm.
Common misconception
Pupils record numbers like 29 thousandths incorrectly as 0.0029
Continue to link representations of thousandths to the place value chart and use language of ten thousandths being equal to one hundredth.
Make sure pupils continue to develop a sense of magnitude for one thousandth in comparison to one whole, one tenth and one thousandth. Replacing place value headings for representative bars is a good way to continue to develop this.
Teacher tip
Licence
This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
Loading...
Prior knowledge starter quiz
6 Questions
Q1.There are centimetres in one metre.
There are centimetres in one metre.
Q2.0.01 is __________of 1
0.01 is __________of 1
one tenth the size
one hundred times the size
ten times the size
Q3.If I make a number ten times smaller, then I make that number ten times smaller again, this is the equivalent of:
If I make a number ten times smaller, then I make that number ten times smaller again, this is the equivalent of:
Dividing by 20
Subtracting 20
Subtracting 100
Q4.One tenth is __________ one hundredth.
One tenth is __________ one hundredth.
10 times smaller than
One tenth the size of
One hundred time bigger than
Q5.0.47 can be described as:
0.47 can be described as:
47 tenths
47 decimals
Q6.Write 97 hundredths as a decimal number.
Write 97 hundredths as a decimal number.
Assessment exit quiz
6 Questions
Q1.There are ___ millimetres in one metre.
There are ___ millimetres in one metre.
10
100
Q2.1 mm written as a decimal number is m
1 mm written as a decimal number is m
Q3.0.001 is __________ 1
0.001 is __________ 1
one tenth the size of
one hundredth the size of
one thousand times bigger than
Q4.0.001 is __________ 0.1
0.001 is __________ 0.1
one tenth the size of
one thousandth the size of
one thousand times bigger than
Q5.If the long blue bar represents one metre, how many metres does this image represent? m
If the long blue bar represents one metre, how many metres does this image represent? m
Q6.86 cm is equivalent to:
86 cm is equivalent to:
806 mm
8.6 m
