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P6 Numeracy 3rd March

Decimals - hundredths Lesson 3

Today we are learning about the relationship between tenths and hundredths

Warm-up activity

This week's focus is on word problems.  In term one, we practised using RUCSAC when answering word problems.

Today's word problems are all time questions.  Download the task below, do your working out and then don't forget to do the inverse calculation to check your answer.

Main activity

Today we are going to look once again at decimals and we are focussing on the relationship between tenths and hundredths.


We are thinking about real life examples of when we would use hundredths and focussing on length (metres) and money (pounds).


In money, a 1p coin is one hundredth of £1 because it takes 100 1ps to make £1.

A 10p coin is one tenth of £1 because it takes 10 10ps to make £1.

One tenth of £1 (10p) is equivalent to ten hundredths of £1 (10 X 1p).


Imagine you have 35p.  

  • I could make this 35p using 35 1ps because 35p is the same as 35 hundredths of £1.
  • I could also make the 35p using 3 10ps (3 tenths of £1) and 5 1ps (5 hundredths of £1).


How else can we write 35p?  Well, we could also write £0.35.  Think about this 0.35. 

  • The zero is the units number.  I don't have any full pounds so that is why there is a zero in the units.
  • The first number after the decimal point is the tenths digit.  It tells me that I have 3 tenths of £1 (3 X 10p)
  • The second number after the decimal point is the hundredths digit.  It tells me that I have 5 hundredths of £1 (5 X 1p)

I can say that 35 hundredths is equal to 3 tenths and 5 hundredths.


Watch today's video where Mrs Bell will go through more examples of tenths and hundredths.  Then download one of the activities below to practise using tenths and hundredths. 

Once you've finished, log in to Education City and have a go at the Over and Under activity.  As part of this activity, you will be using the < and > symbols. Remember,

  • < means less than (or smaller than) e.g. 5 < 6 (5 is less than 6) 
  • means greater than (or bigger than) e.g. 10 4 (10 is greater than 4) 

Reasoning activity

In today's task, we are thinking about reflections and symmetry.  Can you explain the mistakes in the pictures below?  What went wrong?

Play Live Maths!

Have you had a go at Play Live Maths yet this week?  It would be wonderful to see your name on one of our leaderboards!