Mental Math - Subtraction

This video tutorial teaches a strategy for simplifying mental subtraction by using expanded form. It demonstrates how to break down numbers into parts, subtracting each part separately. The method is effective when the minuend is a multiple of 10. For non-multiples, the video explains how to adjust both numbers to make the minuend a multiple of 10, then apply the same strategy. The tutorial concludes with a summary of the mental subtraction techniques covered.

What is the result of subtracting 8 from 80 in the example provided?

Describe the final steps taken to find the difference between 130 and 73.