Algorithms for Addition and Subtraction
Section 3.3
| Activity Name | Activity Description |
|---|---|
| Shape Explorer | The applet creates an irregular shape on a grid. Students determine area and perimeter of the given shape and check their answers with input to the applet. Discussion should focus on grouping both colored and blank rows and columns (for area) and sides (for perimeter) to illustrate a variety of possible algorithms for determining the area. |
| Area Explorer | Students are shown shapes on a grid after setting the perimeter and asked to calculate areas of the shapes. Discussion should focus on grouping both colored and blank rows and columns to illustrate a variety of possible algorithms for determining the area. |
| Perimeter Explorer | Students are shown shapes on a grid after setting the area and asked to calculate perimeters of the shapes. Discussion should focus on grouping sides to illustrate a variety of possible algorithms for determining the perimeter. |
