books.google.com - Frog friends, Matty and Moe, are off with a "Ready, Set, Hop!" They both made it to the rock, but who's in the lead? If Matty hopped 5 hops and Moe hopped 2 more hops than Matty, then the score is 5 to 7. But then they're off again. Any child who can add or subtract can build a simple equation, and Matty...https://books.google.com/books/about/Ready_Set_Hop.html?id=VUSDNT6oOOsC&utm_source=gb-gplus-shareReady, Set, Hop!