Find the Unknown Part with Equations 0-92

Transition from using a number bond to model the relationship between the total and 2 parts, to using an equation. Given the total and the part taken away, what's the other part – how much is left? Imagine the total as counters on a ten frame. Mentally take away or cross off part of them. How many are left?

 
 

2. Practice

Lesson
0-92
Lesson
0-92
Lesson
0-92