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Refresh your knowledge of reading a ruler...
English Rulers
English rulers deal with fractions.
Take a look at the following English Rulers:
A ruler marked in 8ths. Every mark is 1/8th of an inch. You know this by counting the 8 spaces between any two numbers. 1/8 would measure 1 space of the 8 spaces total. The number of spaces goes on the top of the fraction and the total number of spaces between the two large numbers you are using goes on the bottom.
A ruler marked in 16ths. Every mark is 1/16th of an inch. There are 16 spaces between any two numbers. That tells you that the smallest fraction on this ruler will be 1 space of 16 spaces or 1/16.
The center mark between numbers is 1/2. Notice that if you look at the space between the red marks there are only two big spaces. The red lines on these rulers are marked at 1/2, and 1. |
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The next smallest marks on a ruler are 1/4ths. (If we only look at the red lines, we will see there are 4 spaces between the lines of equal lengths.) The red marks on these rulers are at 1/4, 1/2, 3/4, and 1. (1/2 is the same as 2/4). To find 3/4, we would count 3 of the 4 spaces or 3/4. |
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The next smallest marks on a ruler are 1/8ths. Notice that as we get more spaces between the red lines, the lines themselves keep getting smaller. The red marks on these rulers are at 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, and 1. |
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The next smallest mark, if there are any, are 1/16ths. You can continue to divide the spaces in half until you get to 64 spaces. A ruler with 64 spaces between any 2 numbers would have 1 space of 64 being the smallest part to measure. 1 space of 64 would be 1/64th of an inch. The number of spaces goes on the top of the fraction and the total number of spaces between the any two numbers goes on the bottom. The red marks on this ruler are at 1/16, 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, and 1. |
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Now Practice reading a ruler with this fun game. Click to go to the fun game.
Copywritefor the above material by Robert Fogt FAQ: How do I Read a Ruler? http://www.onlineconversion.com 1997-2008
