Subitize with Ten Frames to Name Both Parts 0-110

Build fluency and number sense by using quick images and asking both questions together – "How many?" and "How many more make 20?" A smart strategy is to first figure out whichever is easier – the counters that are there, or counters that are missing. Knowing one is the key to quickly figuring out and knowing the other.

 
 

2. Practice

Lesson
0-110
Lesson
0-110
Lesson
0-110