Assignment Name: Module 2 Activity - Model Addition and Subtraction Activity Grading: This assignment is worth 20 points toward your Activity grade. Activities will be 20% of your grade in the course. Materials needed: Base Ten Blocks (or Drawings) Purpose: The purpose of this activity is to help students understand how base ten blocks are used to develop children's understanding of addition and subtraction. Skills: The purpose of this activity is to Add and subtract whole numbers and decimals using base ten blocks. Add and subtract whole numbers and decimals using the standard algorithms. Analyze why the standard algorithm works. Knowledge: This assignment will also help you to become familiar with the following important content knowledge in this discipline: Model base ten using symbols and math drawings Write base-ten numbers in expanded form Model addition and subtraction of whole numbers and decimals using base ten blocks Add and subtract whole numbers and decimals using the standard algorithms. Directions: Solve the addition or subtraction problems below using base ten sketches and the standard algorithm. a. 432 - 256 b. 43.2 - 25.6 c. 123 + 98 Tasks: To successfully complete this activity, you will need to do the following tasks for each of the three problems... 1. Identify which base ten piece is equal to one whole. 2. Sketch the original problem using base ten pieces. 3. Sketch steps used to solve the problem and how you regrouped the base ten pieces. 4. Sketch the answer using base ten pieces. 5. Solve the problem numerically using the standard algorithm for addition or subtraction. Criteria for success: Label your paper, write neatly, and provide a sketch for every step. Upload a document into the Assignment Dropbox. Acceptable document formats are pdf, jpg, word and excel. For each problem you will be using Base ten pieces (small cubes, longs, and flats) You will need to identify which piece you are using to equal one whole. We typically use the small cube to equal one whole for adding and subtracting whole numbers. You will have to use a different piece to represent one whole for adding decimal numbers. For each problem, you will need to sketch the original problem, show all steps and regrouping, and sketch the final answer. See an example video here. How to add using base 10 blocks. You will then solve the problem the traditional way using the standard algorithm, showing all borrowing, carrying and regrouping steps. See worked out examples below: