KS2 Primary Maths Age 13-17 - Ratio, Proportion and Algebra: Finding Missing Numbers - Explained

The video tutorial explains how to solve a math problem where Jack chooses a number, multiplies it by 7, adds 85, and gets 953. The task is to find the original number by reversing the operations. The teacher demonstrates subtracting 85 from 953 and then dividing the result by 7 to find the original number, 124. The tutorial emphasizes the importance of using the correct method and verifying the solution by reapplying the operations.

What number did Jack choose if he multiplied it by 7 and added 85 to get 953?

What is the first operation you need to perform to find the original number from the final result?

After subtracting 85 from 953, what number do you get?

What is the result of dividing 868 by 7?

How can you verify that your answer of 124 is correct?