Find the length of this line segment (in inches)

Look at 0 and 1 on the ruler. Now count the number of marks between 0 and 1. There are 16 marks. That means the smallest fraction of an inch this ruler shows is 1/16 of an inch.

Segment EF starts at E, over the 0 on the ruler scale. It goes past 1, so the segment is more than 1 inch long. It ends before the 2 on the scale, so the segment is less than 2 inches. Starting at the 1, count the number of 1/16s of an inch. There are 7, so the length of the segment is 1 inch and 7/16 of an inch. This can be expressed as the mixed numeral 1 7/16 inch or as the decimal number 1.4375 in.

1 7/16 inches or 1.4375 inches