KS2 Primary Maths Age 9-13 - Number Problem: - Explained

The video tutorial explains a math problem where Helen starts with an unknown number, multiplies it by two, adds six, and divides the result by four to get 2.5. The instructor demonstrates how to reverse these operations to find the original number, which is 2. The process involves multiplying 2.5 by four, subtracting six, and dividing by two. The tutorial also discusses input and output machines, emphasizing the importance of reversing operations to solve such problems.

What number did Helen start with after reversing the operations?

Explain the process Helen used to check her final answer.