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Unknown Quantities Addition & Subtraction Flash Cards

Item# 688448

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Set of 162 easy to read 61/4" x 31/4" (16cm x 8cm), doublesided flash cards, Cards feature practice for solving unknown quantities in one of three locations

Set of 162 easy to read 61/4" x 31/4" (16cm x 8cm), doublesided flash cards, Cards feature practice for solving unknown quantities in one of three locations.