# Practice 5-Use appropriate tools strategically. - PowerPoint PPT Presentation  Download Presentation Practice 5-Use appropriate tools strategically.

Practice 5-Use appropriate tools strategically.
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1. Mathematically proficient students consider the available tools when solving a mathematical problem. These tools might include pencil and paper, concrete models, a ruler, a protractor, a calculator, a spreadsheet, a computer algebra system, a statistical package, or dynamic geometry software. Proficient students are sufficiently familiar with tools appropriate for their grade or course to make sound decisions about when each of these tools might be helpful, recognizing both the insight to be gained and their limitations. For example, mathematically proficient high school students analyze graphs of functions and solutions generated using a graphing calculator. They detect possible errors by strategically using estimation and other mathematical knowledge. When making mathematical models, they know that technology can enable them to visualize the results of varying assumptions, explore consequences, and compare predictions with data. Mathematically proficient students at various grade levels are able to identify relevant external mathematical resources, such as digital content located on a website, and use them to pose or solve problems. They are able to use technological tools to explore and deepen their understanding of concepts. Practice 5-Use appropriate tools strategically.

3. Exploring the attributes of slope. And an activity with slope.

4. TI 73 Activity: Number Sense 5 6 0 8 1 - _ _ _ _ _ 3 4 7 0 9 What is the missing part in the problem above?

5. TI 73 Activity: Number Sense Is it possible to write numeric expressions using only four 4s that will equal values from 0 to 100. You may use any of the operations, parentheses, exponents, etc that are on your TI 73 calculator. Here is one example: (4X4) – (4X4) = 0

6. TI 73 Activity: Number Sense Graph the following equations. Y = 3x – 2 Y = ½ x + 2 Y = 2x Y = .7x – 1 What do you notice about the lines?

7. TI 73 Activity: Number Sense Exploring the Number Line on a TI 73.

8. TI 73 Activity: Cross Fencing Pastures • This investigation will help you find the area of shapes by splitting them into convenient parts whose areas are easy to find. • Turn your calculator on and choose the APPS key. Choose • 4: GEOBOARD • From the main Geoboard menu, select 2:6x6

9. 2. To format the Geoboard, select FMAT and make • sure that the following settings are selected: • LblsOff (Labels are off) • AxesOff (Axes are off) • CoordOff (Coordinates are off) • Decimal (Measurement is in decimal form) • Select QUIT to exit the FORMAT menu.

10. 3. On your Geoboard, construct the hexagon that your teacher has displayed and find its area by counting squares and half-squares. Check your answer using your TI-73. Your Geoboard should look like the screen that your teacher has displayed. Choose QUIT. Choose OPTN. Choose 4: Erase Board

11. 4. For the next shape (a trapezoid), counting squares and half-squares does not work very well because some parts may not be squares or half-squares. Construct the shape that your teacher has on the screen. Find its area by using a surrounding rectangle (see your teachers screen). Check your answer using your TI-73.