Spectrum(R) Subtraction 0 to 12 Flash Cards offer children a fun and easy way to practice their subtraction skills. Featuring 54 cards with two subtraction problems, plus the answers on every card. Bright, bold numbers are placed on a white background for easy reading. A special card also offers creative game ideas designed to reinforce learning.The popular Spectrum Flash Cards give children a fun and easy way to practice important skills. Offering 12 titles encompassing preschool to grade 5, each title focuses on an important subject including early concepts, math, and phonics. Learning suggestions are included to help children build proficiency and confidence