In this video, a math teacher explains the concepts of multiplication, division, and division by zero. They explain that multiplication is just repeated addition, and division is repeated subtraction. However, division by zero is undefined because it cannot be defined or given a value. The teacher also explores different approaches to zero and shows that there is no consistent result for dividing by zero. They stress that division by zero is not just a mathematical error or a lack of understanding, but an unsolvable problem.
1. Multiplication is repeated adding.
2. Division is repeated subtraction.
3. 1 divided by 0 is undefined.
4. There is no number that can define 1 divided by 0.
5. The limit of 1 divided by x as x approaches 0 does not exist.