How to pronounce “substraction” in English

So, how do I make the students smarter I finally found the answer The essence of studying math is to continuously thinkAddition, substraction, multiplication, division, integer, fraction, minority These are all of it And all you need to do is match them togetherThere is no meaning in learning these matches from anyone It doesn't even make it fun or interesting If you can answer the question, if you can't answer the questions, it doesn't matter