Khan Academy (English - US curriculum)
Math by grade
Eureka Math/EngageNY
4th grade (Eureka Math/EngageNY)
Module 6: Decimal fractions
Topic D: Addition with tenths and hundredths
Adding fractions (denominators 10 & 100)
Adding fractions (denominators 10 & 100)
Sal adds 3/10+7/100 by finding a common denominator.
License: CC BY-NC-SA by Khan Academy