so, in real world application, what's the most useful/valuable topic in mathematics?
Although I wonder for 90% people of this world that math is just a tool to pass the exam at school, not any real application (or they just can't sense it).
Although I wonder for 90% people of this world that math is just a tool to pass the exam at school, not any real application (or they just can't sense it).
Basic arithmetic: addition, subtraction, multiplication, division.