Class 1 Maths Chapter 4 'Subtraction' (full chapter) cbse ncert
Channel: White Star Junior Maths
Date: 11/04/2021

Class 1 Maths chapter 1 to 13 playlist link....
https://www.youtube.com/watch?v=5Bgq0Yzvm6Y&list=PLoPyR0PIrkIcZUXkNwgBMUAwKZyTaH1xH&index=1