Mrs. Russell demonstrates the expand and trade subtraction strategy.
Mrs. Russell demonstrates the expand and trade subtraction strategy.
Mrs. Russell demonstrates how to use the partial sums addition method to add two digit and three digit numbers using Base 10 models.
Mrs. Russell demonstrates the Partial Sums addition strategy.
Mrs. Russell talks about how to use a number line to help with subtraction.
Mrs. Russell talks about how to use Base 10 blocks.