Math worksheet teaching regrouping using base 10 blocks for addition.
A math worksheet titled "Regrouping with Base 10 Blocks" from K5 Learning, showing addition problems with base 10 blocks (cubes, longs, flats) to visually demonstrate regrouping. The worksheet includes examples of adding 427 + 215 and 354 + 136, with visual representations of the blocks and multiple-choice answers.