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14 Cards in this Set
 Front
 Back
SRU

Separate Result Unknown


JRU

Join Result Unkown


SCU

Separate Change Unknown


Direct Modeling
Trial and Error 
An initial set of objects is constructed. A set of a given number of objects is added to or removed, and the resulting set is counted. If the final count is accurate, then the number of objects in the initial set is the answer. If it is not, then the initial set is changed until the desired outcome is achieved.


Direct Modeling
Matching 
Two different sets of objects are constructed. The sets are matched onetoone until one set is used up. The answer is the number of unmatched objects remaining.


Direct Modeling
Matching 
Two different sets of objects are constructed. The sets are matched onetoone until one set is used up. The answer is the number of unmatched objects remaining.


Direct Modeling
Separating To 
A set of objects is counted out. Objects are removed from it until the number of objects remaining is the desired outcome, the answer being the number of objects removed.


JSU

Join Start Unknown


Direct Modeling
Joining To 
A set of objects is constructed. Objects are added until arriving at the desired outcome, the answer being the number of objects added.


Direct Modeling
Joining All 
Using objects or fingers, two sets of objects are joined and counted.


SSU

Separate Start Unknown


JCU

Join Change Unkown


Direct Modeling
Separating From 
Using objects or fingers, a set of objects is constructed. Some objects are removed, the answer being the number of remaining objects.


Direct Modeling
Separating From 
Using objects or fingers, a set of objects is constructed. Some objects are removed, the answer being the number of remaining objects.
