A good way of working with decimals is the use of shapes that are divided into ten equal parts. The form is a single whole and each part is a tenth, which can be written as 0.1.
This page has a selection of shapes and asks the child to write down the amount that is gray. When all parts of a shape are shady this counts as ten tenths, or entire one.
While the printed pages almost always display the decimal point located on the line most schools show like half way up the line: the main thing is that it appears clear.
This page can be found in our year 4 mathematics worksheets in Counting the number and category.
Tenths of rectangles (1)
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