Nora has 8 red counters and 5 blue counters. She moves 2 blue counters beside the red counters to make 10. How many counters are there altogether?
Answer
13 counters
Reasoning Strategy
Split 5 into 2 and 3, make 10 with 8 + 2, then add the remaining 3.
AI Support Preview
Keep the 3 unused blue counters visible after completing the group of ten.