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      Compare and describe measurements involving time and money

      Lesson details

      Learning outcome

      I can compare and describe measurements involving time and money.

      Key learning points

      1. A change in time or amount of money can be described multiplicatively.
      2. The sentence 'The __________ is ___ times the __________ of the __________' supports understanding.
      3. Comparisons of measure can be represented as multiplication or division equations.

      Keywords

      • Times the __________ - Times the time/times as long/times the amount of money are phrases that can be used to compare and describe - one child might run a race in three times the time of another child.

      Common misconception

      Children are more familiar with multiplication resulting in an increase and need to appreciate that it can also result in a decrease.

      When we multiply an integer by a unit fraction, the effect is the same as dividing the whole by the denominator. It results in a decrease.

      Teacher tip

      It is important that children are fluent with their times table facts. Note, we cannot compare temperature because 0° does not mean there is ‘no temperature’. It is possible to compare duration using multiplicative reasoning but not instances of time.

      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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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Match the possible masses of an adult penguin and chick. The bar model shows that a penguin chick is one quarter times the mass of an adult.

      An image in a quiz
      Correct Answer:The mass of the adult penguin is 36 kg,The mass of the chick is 9 kg

      The mass of the chick is 9 kg

      Correct Answer:The mass of the adult penguin is 32 kg,The mass of the chick is 8 kg

      The mass of the chick is 8 kg

      Correct Answer:The mass of the adult penguin is 28 kg,The mass of the chick is 7 kg

      The mass of the chick is 7 kg

      Correct Answer:The mass of the adult penguin is 24 kg,The mass of the chick is 6 kg

      The mass of the chick is 6 kg

      Q2.
      Look at the bar model showing the mass of an adult penguin compared to the chick. Which equations can be formed from the bar model to calculate the mass of the chick?

      An image in a quiz
      36 kg × 4 =
      Correct answer: 36 kg ÷ 4
      Correct answer: 36 kg × $${1}\over{4}$$ =
      36 kg ÷ 5

      Q3.
      Which bar model matches the image?

      An image in a quiz
      An image in a quiz
      Correct Answer: An image in a quiz
      An image in a quiz
      An image in a quiz

      Q4.
      The capacity of the mug is one third times the capacity of the kettle. Which bar model represents this statement?

      An image in a quiz
      An image in a quiz
      Correct Answer: An image in a quiz
      An image in a quiz
      An image in a quiz

      Q5.
      The capacity of the mug is one third times the capacity of of the kettle. The capacity of the kettle is 1 l 500 ml. The capacity of the mug is ml

      Correct Answer: 500, five hundred

      Q6.
      The mass of the adult penguin is six times the mass of the chick. Read the scale and calculate the mass of the adult penguin.

      An image in a quiz
      Correct answer: 3 000 g
      3,600 g
      2,400 g
      Correct answer: 3 kg

      6 Questions

      Q1.
      Izzy and Sam both cycle to school. It takes Izzy 6 minutes. It takes Sam four times as long. Does this table represent the times?

      An image in a quiz
      Correct answer: Yes
      No

      Q2.
      Izzy and Sam both cycle to school. It takes Izzy 6 minutes. It takes Sam four times as long. It takes Sam minutes to cycle to school.

      Correct Answer: 24, twenty four

      Q3.
      Izzy plays the whole 45 minutes of a netball match but Jacob has to leave after 15 minutes. Which statement describes how long he played for?

      An image in a quiz
      Jacob played for three times the time Izzy played.
      Correct answer: Jacob played for one third of the time Izzy played.
      Correct answer: Jacob played for 30 minutes less time than Izzy played.

      Q4.
      Sam saved £50. Jacob saved one fifth times as much money as Sam. Which representation shows this?

      An image in a quiz
      Correct Answer: An image in a quiz
      An image in a quiz

      Q5.
      Sam saved £50. Jacob saved one fifth times as much money as Sam. Which two calculations would you need to work out how much money Jacob and Sam saved together?

      Correct answer: £50 ÷ 5 = £10
      £50 × 5 = £250
      Correct answer: £50 + £10 = £60
      £50 + £250 = £300

      Q6.
      Match the amounts of money that Izzy and Lucas might have saved. The bar model compares the amounts of money they have saved.

      An image in a quiz
      Correct Answer:Lucas saved £300,Izzy saved £50

      Izzy saved £50

      Correct Answer:Izzy saved £12,Lucas saved £72

      Lucas saved £72

      Correct Answer:Lucas saved £30,Izzy saved £5

      Izzy saved £5

      Correct Answer:Izzy saved £6,Lucas saved £36

      Lucas saved £36

      Correct Answer:Lucas saved £3.60,Izzy saved 60 p

      Izzy saved 60 p


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