While no longer free, last sessions app: Singaling, is still awesome and I recommend you check it out! Today I've found:
King of Maths: Full Game
"Level up your mathematics skills and become King of Maths!"
This interactive math facts game allows users to work their way through various mathematical challenges in order to advance through a hierarchy of medieval styled characters. This multiple-choice math fact fluency game features middle-school leveled questions about:
- Mixed Operations (Order of Operations)