Trading Ones for Tens

I recently added a new unit to my TpT store for students to practice trading ones for tens when learning to regroup. It's a very simple procedure that encourages kids to use Base-10 block models until they actually "see" what they're doing.

The set comes with whole-group cards for students to practice making and adding numbers 5-9 (regroup to tens), then a transitional game where students try to make a pizza by being the fastest to correctly make Base-10 models of the sum of their addition problem. Different levels of play have different toppings on the pizza!