New
New
Year 5

Describe and represent tenths as a decimal number

I can describe and represent tenths as a decimal number.

New
New
Year 5

Describe and represent tenths as a decimal number

I can describe and represent tenths as a decimal number.

Lesson details

Key learning points

  1. If a digit is moved one place value column to the right it becomes one tenth the size.
  2. One tenth is one tenth the size of one whole.
  3. Tenths are recorded in the column to the right of the decimal point so one tenth is 0.1
  4. 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 (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

Loading...

6 Questions

Q1.
10 ones are equal to __________
10 tens
Correct answer: 1 ten
1 one
Q2.
10 tenths are equal to __________
10 tens
1 ten
Correct answer: 1 one
Q3.
What is the value of the 1 in the place value chart?
An image in a quiz
Correct Answer: one hundred, 1 hundred, hundred
Q4.
One thousand is __________ the size of one hundred.
An image in a quiz
Correct answer: ten times
one hundred times
one thousand times
Q5.
Match the letter to the correct value.
An image in a quiz
Correct Answer:A,7 tenths

7 tenths

Correct Answer:B,2 tenths

2 tenths

Correct Answer:C,9 tenths

9 tenths

Q6.
Which picture represents seven tenths? Write the letter.
An image in a quiz
Correct Answer: A, a

6 Questions

Q1.
The decimal point separates __________.
the ones from the tens
Correct answer: the whole numbers from the fractional parts.
the fractional parts from the decimal numbers.
Q2.
If I make 1, one tenth the size, it becomes __________.
one ten
Correct answer: one tenth
one hundred
Q3.
One is __________ times the size of one tenth.
Correct answer: ten
hundred
one-tenth
Q4.
Write five tenths as a decimal number.
Correct Answer: 0.5, zero point five, nought point five, point five
Q5.
Which image does not show 3 tenths?
An image in a quiz
A
B
Correct answer: C
D
Q6.
Match each letter to its correct value.
An image in a quiz
Correct Answer:A,0.7

0.7

Correct Answer:B,0.9

0.9

Correct Answer:C,0.2

0.2

Correct Answer:D,1

1