PROBLEM TYPE

Join  Result Unknown
Laina had four dolls. She bought two more. How many dolls does she have now?
4 + 2 =
 Change Unknown
Laina had four dolls. She bought some more dolls. Now she has six dolls. How many dolls did Laina buy?
4 + = 6

Laina had some dolls. She bought two more dolls. Now she has six dolls. How many dolls did Laina have before she bought some more?
+ 2 = 6

Separate
 Result Unknown
Rodney had ten cookies. He ate three cookies. How many cookies does Rodney have left?
10 – 3 =
 Change Unknown
Rodney had ten cookies. He ate some of the cookies. Now he has seven cookies left. How many cookies did Rodney eat?
10  = 7
 Initial Quantity Unknown
Rodney had some cookies. He ate three cookies. Now he has seven cookies left. How many cookies did Rodney have to start with?
 3 = 7

PartPartWhole
 Whole Unknown
Five boys and three girls are on the basketball team. How many children are on the basketball team?
5 + 3 =
 Part Unknown
Eight children are on the basketball team. Five are boys and the rest are girls. How many girls are on the basketball team?
5 + = 8

Compare
 Difference Unknown
Ahmed has two brothers. Christine has three brothers. Christine has how many more brothers than Ahmed?
3 – 2 = or 2 + = 3
 Larger Quantity Unknown
Ahmed has two brothers. Christine has one more brother than Ahmed. How many brothers does Christine have?
2 + 1 =
 Smaller Quantity Unknown
Christine has one more brother than Ahmed. Christine has three brothers. How many brothers does Ahmed have?
+ 1 = 3 or 3  = 1
