2-Digit Subtrahends: No Shifting 2-99

Generalize from subtracting multiples of 10, to subtracting 3-digit and 2-digit numbers with no regrouping. What's 365-41? Use Base 10 discs and number bonds to model expanded form. Find partial differences to get the total difference. 300-0 = 300, 60-40=20, 5-1 = 4, and 300+20+4 = 324, so 365-41 = 324.

 
 

2. Practice

Lesson
2-99
Lesson
2-99
Lesson
2-99