Numbler is a fun iOS app that I just found out about from Edshelf. This app is very similar to a crossword puzzle but instead of filling in the box w/ a letter a person fills it in w/ a Math variable/number. This is a great game for strengthen Math skills and can be played by people of all ages. People compete as they fill in boxes w/ numbers or Math symbols it create a equation.
I highly recommend checking out Numbler by clicking here!!!
For my 50 Math Sites & Apps click here.