The Subtraction Flash Cards Math Educational Mathematics Set of 52 by Teaching Tree is a comprehensive math educational tool designed for students of various age levels. With vibrant and educational content, this set of flashcards helps students grasp subtraction concepts effectively. Made in China in 2019, these flashcards are a valuable resource for students looking to improve their math skills in a fun and interactive way. Suitable for ages 4 and up, this set is a must-have for anyone looking to enhance their mathematics knowledge.