Different math applications were developed by different people, so no one person is credited with inventing math. Numbers, and as a result, math, has been around since 35,000 BC.
In 35,000 BC, the Africans developed the first notched tally bones used for counting. The first modern counting and measuring system was developed by the Sumerians in 3100 BC and the first fully functional 10-number system was developed among the Egyptians in 2700 BC. As the years went on, newer forms of math were developed with mathematicians like George Peacock and Charles Babbage each making his own contribution to the math that is used today.