Ricardo is in Year 6. He has learnt the names of the place value
columns and appreciates that the value of the columns decreases
by a factor of ten as he moves to the right. This allows him to
correctly order 0.1 and 0.01 as one tenth is larger than one hundredth.
However, he has incorrectly generalised that any number of tenths
is greater than any number of hundredths, for example, 0.1 is greater
than 0.24. Denominator Focussed thinking is one of the shorter-is-larger