Julia played tag with 38 kids on monday, 18 kids on tuesday and 39 kids on wednesday. How many kids did she play with on tuesday and wednesday?
Julia played with 38 kids on Monday. 
On Tuesday, she played with 18 kids. This means that she played with a total of 18 + 38 = 56 kids on Tuesday and Wednesday. 
On Wednesday, she played with 39 kids. This means that she played with a total of 39 + 18 = 57 kids on Tuesday and Wednesday. 

Therefore, Julia played with 18 kids on Tuesday and 39 kids on Wednesday.