Did your Maths Teacher teach you this easy way of subtracting in your head?

Easy Subtraction Trick | Easy and fast way to learn | Math Tips and Tricks

Could not use this method in my head. Prefer the old fashioned method. My Maths teacher never taught me anything!

Ron

Our teacher always made us keep our hands on our heads so that she could see if we were counting on our fingers. My mother made us whistle when we were shelling peas.