Answer:
20
Explanation:
Take note of the important information/key words:
60 total ornaments 
3 grandchildren
Divide them evenly
Set up an equation: 
60 ornaments ÷ 3 grandchildren = ornaments per grandchild
60 ÷ 3 = 20 ornaments per grandchild. 
In other words, each grandchild will receive 20 ornaments.