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Subtraction Secrets: Mindware's Best Number Problems (Grades 1-4)
Subtraction Secrets Mindware's Best Number Problems - Grades 1-4 Author:Evelyn B. Christensen Math Secrets — Reveal the Answers to Math Mysteries! — Fun puzzle books that do more than reinforce math facts: They take students on adventures big and small! Students solve addition* (see Addition Adventures) and subtraction problems and use the answers to plot their way north, east, south and west. At the end of the path is a pot of gold, a sec... more »ret message or a missing pet lizard. Each book has 30 puzzles sure to intrigue young math students. 44 pages each.