What Math invented in africa?

What digit is the tenths place? How much does a 1 x 4 x 10 weigh? How can change volume into weight? Farming: A farmer owns 98 acres of land. Of the 98 acres, only 70% can be farmed. How many acres are available for farming? What 2 numbers equal 116? How do you convert 62 percent to a fraction and decimal? How do you write one hundred two thousand five hundred sixty three? What is a tribute proof coin? What number is six in Roman Numerals? How do you find the measurement of the third angle on an isosceles triangle? What does ccxix stand for in roman numbers? What 2 types of lines make up a grid? What unit would you use to measure capacity? How is 88900.00 write in words? What is the relationship between addition and subtraction of integers? How do you write 6.03 as a fraction? What is a closed shape that is not a polygon made entirely of segments? What is 0.76 as a fraction? What 2 numbers divides into 197? Is 53 prime or composite and why?