Master addition & subtraction strategies & increase math fact fluency with the lessons, posters, worksheets and work mats in this HUGE resource! You'll love the spiraling review built into this program - teach 19 strategies independently then practice them with previously learned skills. Strategies:add 0, subtract 0add 1, subtract 1add 2, subtract 2Add 10 moreFriends of 10fact familiessubtraction from 10doublesnear doubles / doubles plus 1subtract alladd 3, subtract 3add 9make a group of 10