Subtract Two-Digit number by 10 (Fastest & Easiest Method) (1.NBT.C.5)

In this video, we show the fastest and easiest way to subtract any two-digit number by 10. Students can now learn this pivotal foundational skill within minutes.

This is a part of the Common Core Math Standard 1.NBT.C.5 where the objective is to "Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count."

You can see all 90 examples and other lessons for foundational math skills at https://www.MyMathTA.com