20 MATH STORIES y en español 
4. Add it up! (gr. 24): The boy who cried "Wolf!" meets Wolf in sheep's clothing and learns neat ways of adding numbers in his head. [addition; number sense; alternate solutions]  
NUMBER PATTERN/ALGEBRA MEASUREMENT/GEOMETRY DATA/PROBABILITY


Neat ways to add! The boy who cried "Wolf!" meets Wolf in sheep's clothing and learns neat ways of adding numbers in his head. Content: mental addition methods 39 pages 
