Get the complete synergistic number sense package with this zip file of seven of my math store items on number sense. Separately, they would total $20.65, but I put this bundle together to encourage the fidelity of this learning process. Add to your computer file 250 ready slides to project 5 minute Mental Math Mini Lessons. Pick up some synergistic number sense routines with these brain builders. Order Properties, Grouping Properties, Distributive Properties, Adding 0, Multiplying by 1 Pr