Double-Value Addition & Subtraction Flashcards

Vertical-format double-value flash cards that teach addition and subtraction through visual aid. 81 cards printed two sides: one side shows an addition problem and the reverse shows the directly related subtraction problem (example: 3+1=4 on one side, 4-1=3 on the reverse). For every addition fact there are three other facts in the same family. Suggested activities included. Educational aims: familiarize children with basic addition and subtraction facts; quick recall and "mental math"; application and interpretation of mathematical language; auditory/visual association. Product features: Best Seller! Notched corners for quick organization; large, easy-to-handle 6-1/4" x 3-1/4" cards; bold, heavy type; durable 14 pt. card stock; self-checking (number on lower right gives the correct answer for the opposite side). Great for small groups, pairs, and whole-class participation. Contents: 81 vertical format flash cards plus suggested activities and complementary equations key. Grade Level: K – 3.