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Year 5

Describe and represent hundredths as a decimal number

I can describe and represent hundredths as a decimal number.

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New
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Year 5

Describe and represent hundredths as a decimal number

I can describe and represent hundredths as a decimal number.

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Share activities with pupils
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Lesson details

Key learning points

  1. If a digit is moved one column to the right it becomes one tenth the size.
  2. One hundredth is one tenth the size of one tenth.
  3. Hundredths are recorded in the column to the right of the tenths so one tenth is 0.01

Keywords

  • Hundredth - The name we give to one part of one hundred equal parts.

  • One hundredth the size - When a whole is divided into one hundred equal parts, we can say one of those parts is one hundredth the size of the whole.

  • Hundredths column - The hundredths column places the number of hundredths a given number has.

Common misconception

Pupils may record two-digit hundredth values incorrectly. For example 12 hundredths as 0.012

Use place value counters to represent the number and demonstrate the regrouping of ten hundredths.

Make sure pupils have time to use the language of 'one hundredth the size' and 'one hundred times smaller' interchangeably. You might like to give time to pupils moving digits within a place value chart to combine language and operation.
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

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Starter quiz

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6 Questions

Q1.
Look at the image. What is the value the shaded part?
An image in a quiz
one tenth
Correct answer: one hundredth
one decimal
Q2.
What is the value of the 1 in this place value chart?
An image in a quiz
Correct Answer: one tenth , A tenth , tenth , 0.1
Q3.
One tenth can be written as 0.1 so 3 tenths can be written as .
Correct Answer: 0.3 , Zero point three , Nought point three
Q4.
0.1 is __________ than 1.
Correct answer: ten times smaller
ten times bigger
ten tenths bigger
Q5.
Which number is one tenth the size of 100?
100
Correct answer: 10
1
0.1
0.01
Q6.
Tick the correct descriptions for this representation.
An image in a quiz
Correct answer: 16 hundredths
16 tenths
Correct answer: 1 tenth and 6 hundredths
1 whole and 6 hundredths
1 whole and 6 tenths

Exit quiz

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6 Questions

Q1.
When a number is made 100 times smaller, it is one ___________ the size of the whole.
hundred
Correct answer: hundredth
tenth
Q2.
What number is one hundredth the size of 100?
Correct answer: 1
10
0.1
Q3.
What number(s) are being represented on the number line?
An image in a quiz
Correct Answer:A,0.45

0.45

Correct Answer:B,0.50

0.50

Correct Answer:C,0.54

0.54

Q4.
Here is a zoomed in picture of a 1 litre jug. How much water is there? Write your answer as a decimal.
An image in a quiz
Correct Answer: 0.48, 48 hundredths, 0.48 l, 48 hundredths of a litre, 0.48l
Q5.
One hundredth the size of one is . Write your answer as a decimal number.
Correct Answer: 0.01 , one hundredth, one 100th
Q6.
If 3 is made one tenth the size, and then one tenth the size again, what will the number become?
Correct answer: 0.03
0.3
3
30
300