Word problems problem type



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TYPES OF ADDITION & SUBTRACTION


WORD PROBLEMS


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

Initial Quantity Unknown


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


Part-Part-Whole

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

[Adapted from: Math Matters, Grades K-6, Math Solutions Publications]



CDGoals\Bk 3-5\Chp9\Types of Add & Sub Word Problems.doc





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