I hope you brought your mask and flippers, because there is more to be done at the aquarium! Now that we've learned how to regroup with addition, we get to do practice with subtraction. Using the same base ten block models, students learn to regroup, or "borrow" from the tens place to subtract in the ones place. Taking a ten and breaking it down into ten ones takes practice, but our MightyOwl friends will help you along the way!