The Insert Up approach involves including up from your number remaining subtracted (subtrahend) to the whole (minuend). Start by picking out challenges exactly where the minuend and subtrahend are shut together (e.g. fifty seven - fifty three or 332 - 326) to create an understanding of subtraction as the distance https://www.generationgenius.com/videolessons/strategies-to-add-subtract-within-20-make-a-10-doubles-facts/