Harness the power of simplicity——Why is the product of two negative numbers positive?
In my previous article, I answered two questions: “Why does 3 times 4 equals 12?” and “Why does 3.3 times 4.4 equal 14.52?”, and then raised a new question: “Why does -3 times -4 equal 12?” Some people may answer that by saying that the product of two negative numbers must be positive, so -3…