Judging by the comments below and my own experience of this lesson i think it could still be tweaked to improve it.  It think it would be helpful to: 

* add - write out - relevant (new to some) vocabulary for decimals, commas and currencies

* emphasise how the rules for writing numbers in French are the same (or different) when used for currencies vs other contexts

* provide and describe a few more complex examples, including the outliers (eg uncommon use of a decimal point in French), with at least one example of a French number which translates to three or more decimal points in English. The latter would be very useful because it highlights how our Eng/French translation brain can get confused (evident in these discussions) because it looks identical to the English version of numbers in the thousands.