Unknown Quantities Addition and Subtraction Flash Cards
Set of 162 easy to read 6-1/4" x 3-1/4" (16cm x 8cm), double-sided flash cards, Cards feature practice for solving unknown quantities in one of three locations.
These cards provide practical solving for the unknown in one of three locations.
Notched corners for quick organization. Large, easy to handle 6-1/4" x 3-1/4" cards. Bold, heavy type to use with large groups. Durable, thick card stock (14 pt.). Self-checking. Great for small groups, pairs, and whole class participation.
Ages 5+