Addition Basic Facts: Make Ten . Knowing the pairs of numbers that add to make a total of ten is one of the most important sets of addition basic facts. Knowledge of this set of addition facts will be used in many contexts as students progressively develop mathematical understandings. . Ten-frames are a fantastic resource for representing a total of ten. The frame maintains the focus on what ten looks like. The ten-frame will always hold ten when it is full. In this lesson students will experien