Khan Academy (English - US curriculum)
Math by grade
Eureka Math/EngageNY
3rd grade foundations (Eureka Math/EngageNY)
Module 3: Foundations
Topic B: Foundations
Subtracting a 1-digit number with regrouping
Subtracting a 1-digit number with regrouping
Sal subtracts 35-8.
License: CC BY-NC-SA by Khan Academy