Simple Addition and Subtraction Puzzles Grades K - 2. Teach and
reinforce essential basic skills with these 20 self checking,
five-piece simple addition and subtraction puzzles. Center piece
of each puzzle features a number with four surrounding pieces
that show four different ways to compute that number using
addition or subtraction. Unique die cuts on each puzzle makes
self correction a snap! These 8" x 8" plastic coated puzzles are
durable and easy for small hands to manipulate. Includes an
activity guide.