Mental Math without tricks - Subtraction Strategies 🧠 

In this video, I share how I do subtraction mentally. I do not use tricks; I do mental calculations by 'structuring' the problem.
I've created a google sheet containing 8K subtraction problems that you can use to hone your mental math skills. Here's the link:
docs.google.co...
Did you find the video and the sheet helpful? Let me know in the comments.