Larger Decimals

Age Range: 7 - 11

There are two activities in this section:

A) How to introduce children to decimals larger than 1.0 (but smaller than 2.0)

1) Draw a rectangle on the board and split it into ten sections:

                   

2) Colour in one section at a time and ask a child to identify how much of the rectange is coloured (giving their answer in fractions and decimals).

3) When you have coloured in all ten sections, draw another rectangle and split it into ten sections again. Then colour in one of the sections of this new rectangle.

                   
                   

4) Explain that you now have one unit and one tenth coloured. Ask how they think we might be able to write down that number (in fractions or decimals), i.e. 1 and 1/10 or 1.1. Repeat this activity, colouring in a few more sections of the second rectange. Discuss how these numbers can be written.

5) Give each child a copy of the Decimals Strips (available below). Ask them to cut out one whole strip and colour it in. Then they should cut out another strip and only colour a few of the sections in. After sticking the strips in their books, they can then write information about these strips, describing the number that they have shown with their colouring, e.g.

                   
                   

One unit and 9 tenths are coloured.
This can also be written as 1 9/10 or 1.9 (which we say as "One Point Nine")


B) Matching larger fractions and decimals

This activity can be carried out as a whole class with the table (shown below) drawn on the board (and with individual children coming to the front to complete the activity) or individually with children completing the worksheet which can be found below.

The aim of the activity is to develop children's understanding of the relationship between these larger fractions and decimals.

Fraction (words) Fraction (figures) Decimal (figures) Decimal (words)
One Unit and One Tenth 1 1/10 1.1 One Point One
One Unit and Two Tenths 1 2/10 1.2 One Point Two
    1.3  
  1 4/10    
      One Point Five
One Unit and Six Tenths      
    1.7  
  1 8/10    
    1.9  
      Two Point Nought


Children should complete the table by filling in the blank spaces. Numbers in each row have the same value (i.e. One Unit and One Tenth = 1 1/10 = 1.1 = One Point One). The third row should therefore look like this:

One Unit and Three Tenths 1 3/10 1.3 One Point Three

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V

Great explanation. Thank you.

Rating: 
5