Performance Stations in Math
Ratio & Proportion
Grade 8
by
Liliane Gauthier
Teacher / Educational Consultant
Saskatoon Board of Education

 
2. Ratio & Proportion
Grade 8
R-2, R-3, R-4

Materials:   bag with cm cubes   1. In your notebook, draw the following table. red blue black               2. Without looking in the bag pick a cube and record the color on your chart. Return the cube to the bag. 3. Continue this process until you can the determine the ratio of red:blue:black. 4. Estimate the number of cubes of each colour. 5. Suppose there are 60 cubes in the bag, how many of each colour will there be? 6. Suppose you double or triple the total number of cubes in the bag. How will this affect the ratio of each colour? 7. Open the bag to count the cubes. Compare these findings with your above answers.

 
3. Ratio & Proportion
Grade 8
R-6, R-7

Materials:   cards with sale items   ruler   protractor   calculator   1. a) Look carefully at the cards. Record those items that are sold in multiples Choose three samples.   b) Make a chart to show the following:

Number in package
Cost of package

		c) List five equivalent ratios from the chart.   d) In your own words define the meaning of equivalent ratio.   2. a) The angles of a triangle are in the ratio 2:3:5. Draw three triangles that have this ratio; one having a side of 2, and the second a side of 4 and the third a side of 6.   b) Write the ratio of the sides of each triangle. Explain why we call these equivalent ratios.   c) Measure the angles in each case. What can you say about similar triangles?
		4. List 3 ratios that are equivalent to 6:24. Can you find one where the sum of the terms is 120?   5. Change the following ratio to lowest terms and illustrate with a diagram.  18:30:24   6. Ratio & Proportion Grade 8 R-9, G/M-18     Materials:   cards with scale drawings   road maps   1.   Look carefully at the drawings on the cards. Determine the scale that was used and state whether the drawing is an enlargement or a reduction. 2. a) Look in atlases, road maps, etc. and find 10 different scales. Name the map and state the scale used in each case. 2. b) Why do we use different scales for different maps? Return to Math Central To return to the previous page use your browser's back button.