1+1=5: A Book to Explore Unlikely Additions

Let me be clear, this book is NOT trying to confuse children into thinking that the addition statement 1+1=3 is a true!  Under the arithmetic operation of addition, of course the expression 1+ 1 has only one value, 2.  In order for the equation 1+1=3 to make sense, we need to add in some units.

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