Looking for a great way to model subtraction without any hassles?
This Notebook File containing ten identical pages allows you to model subtraction using any number to 99.
The TENS CAN BE UNGROUPED to actually SHOW DECOMPOSITION.
Throw the subtracted items into the bag. They will always go behind the picture. No Need to play around with layers.
Don't forget to save the file as read only so you can use it again and again!