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 was the final result after Jack multiplied his chosen number by 7 and added 85?

• 7

• 85

• 953

• 124

What is the first step in reversing the operations to find Jack's original number?

• Multiply by 7

• Add 85

• Subtract 85

• Divide by 7

After subtracting 85 from 953, what is the next operation to perform?

• Subtract 7

• Add 85

• Divide by 7

• Multiply by 7

What is the original number Jack chose if the final result was 953?

• 85

• 953

• 124

• 7

How can you verify that the original number found is correct?

• By adding 85 to the original number

• By subtracting 85 from the original number

• By multiplying the original number by 7 and adding 85

• By dividing the original number by 7