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Did you mean? Sibiga, Matthew

"Everyone knows some ghosts are helpful spirits--they may even help with math! In this high-interest volume, a unique mix of eerie info and math exercises, young mathematicians can practice their subtraction skills using illustrated ghost models as well as hone their mental math ...

Spooky problems

Two of the biggest challenges that children face in learning math are logic and problem solving. Learning to understand the reasoning that hides behind a "problem" will transform it into an extremely engaging and satisfying game. This book makes it all possible, thanks to a colle...

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Color photos of familiar objects help you introduce your toddler to simple math.

"A summer trip to her grandparents' house was going great until Jesse gets caught up in a mystery in the attic. When she encounters a pair of spooky green eyes during a lightning storm, Jesse sets out to use engineering skills to solve the Case of the Clicking Clock."

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