1. Module 2

1.3. Page 3

Mathematics 10-3 Module 2

Module 2: The Imperial System

 

Explore

 

In this lesson you will use a ruler or tape measure with inches marked. By studying the markings on a ruler, you can learn to use your ruler to measure lengths properly.

 

m10_3_trythis.jpg Try This

 

Have a look at your ruler or tape measure. It should look similar to the one pictured.

 

Does your ruler or tape measure, in feet and inches, look similar to the ruler shown?

 

This image shows a six-inch ruler that includes centimetre readings.

 

Look at the divisions on the ruler shown. The longest vertical lines on the ruler are located every whole inch. These lines are at 1 in, 2 in, 3 in, and so on.

 

TT 5. What do the slightly shorter lines mark (line A in the image)? What would the measures be at such a line between 2 in and 3 in?

 

TT 6. What fraction do the next shorter lines mark (line B in the image)? What measures do these vertical lines represent between the 1-in and 2-in marks?

 

TT 7. What do the next shorter lines represent (line C in the image)?

 

TT 8. So, what can you say about the shorter and shorter vertical lines?

 

TT 9. What is the smallest fraction of an inch that is shown between 0 in and 1 in?

 

TT 10. Use your ruler or tape measure to measure at least four items. Use the lines on your tape measure or ruler to be as precise as you can be.

 

m10_3_share.jpg Share

 

It’s time to share your answers to TT 5–TT 10. Remember that sharing work is an important part of learning. Use the following tips to ensure you get all the benefits from this sharing opportunity:

  • Complete the questions to the best of your ability. Make sure your answers are in a form that you can easily share with another student or with your teacher, if so directed.

  • Use your class discussion area, or another method indicated by your teacher, to post your answers and to view the work of the people you’re sharing with.

  • Compare your answers to the other posted answers. Identify where you have similar answers and where your answers are different. Discuss all differences between answers until you agree on the answers. If necessary, you may wish to involve your teacher in your discussion.

  • Revise your answers where necessary.

Save a revised copy of your work in your course folder. Ask your teacher whether you should also save a summary of your discussion in your course folder.