



 
Priscilla, The problem here is simple, ELLIE HAS 12 BOOKS. SHE GIVES AWAY 3 BOOKS. These are the facts you need to use ELLIE HAS _LEFT. This is the answer you will get. You (or your child) _  _ = _ Fill in the subtraction problem you actually solved here. _ _ = _ Fill in the other subtraction problem using the same numbers _+_ = _ I've corrected a typo here; fill in one of the two addition problems you can make from the same numbers (eg, c+b=a) _ + _ = _ And fill in the other one  use the fact that addition is commutative, that is, the order does not matter. Good Hunting!
 


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 