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New
Describe and represent tenths as a decimal number
I can describe and represent tenths as a decimal number.
New
New
Describe and represent tenths as a decimal number
I can describe and represent tenths as a decimal number.
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Lesson details
Key learning points
- If a digit is moved one place value column to the right it becomes one tenth the size.
- One tenth is one tenth the size of one whole.
- Tenths are recorded in the column to the right of the decimal point so one tenth is 0.1
- The decimal point separates whole numbers from numbers with a decimal fraction part.
Keywords
One tenth the size - When a whole is divided into ten equal parts, we can say one of those parts is one tenth the size of the whole.
Tenths column - The tenths column places the number of tenths a given number has.
Decimal point - A decimal point is a small dot used in a number to separate the whole number from the fractional part.
Common misconception
Pupils put a digit in the ones column instead of the tenths column to represent a number of tenths.
Continue to ask what each digit that has been recorded represents, linking back to the place value chart and the role of the decimal point.
Encourage children to notice that when the place value headings are removed, using zeros is not enough as each 1 is worth ten times more than it should be. This is why we need the decimal point.
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
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Starter quiz
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6 Questions
Q1.
10 ones are equal to __________
10 tens
1 one
Q2.
10 tenths are equal to __________
10 tens
1 ten
Q3.
What is the value of the 1 in the place value chart?
Q4.
One thousand is __________ the size of one hundred.
one hundred times
one thousand times
Q5.
Match the letter to the correct value.
7 tenths
2 tenths
9 tenths
Q6.
Which picture represents seven tenths? Write the letter.
Exit quiz
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6 Questions
Q1.
The decimal point separates __________.
the ones from the tens
the fractional parts from the decimal numbers.
Q2.
If I make 1, one tenth the size, it becomes __________.
one ten
one hundred
Q3.
One is __________ times the size of one tenth.
hundred
one-tenth
Q4.
Write five tenths as a decimal number.
Q5.
Which image does not show 3 tenths?
A
B
D
Q6.
Match each letter to its correct value.
0.7
0.9
0.2
1