Y 4 Free mathletics access
Mathletics Uk have a free 48 hour trial
I have written a word document which is attached, I have included screenshots to guide you through the log in process. As it is a free 48 hour trial, I would suggest that you download the workbooks that you feel will be appropriate to your child and their learning.
I had planned on starting to use some of these resources in the classroom before the Coronavirus quarantine, I have had excellent results in other schools using these resources.