Reading A Ruler - Skills Tutor

Basic Mathematics

Reading a Ruler

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Click to begin Reading a Ruler In lessons dealing with pictures, such as rulers, graphs, and shapes, the objects are not always drawn with the measurements that are indicated. The rulers on the following screens, for example, are enlarged to show the detail of the markings. Reading a Ruler Check the ruler to find the units for the smallest marks. In the ruler below, there are 8 divisions per inch, so the marks are \(\frac{1}{8}\) inch apart. The arrow above this ruler is at \(2\frac{6}{8}\)or \(2\frac{3}{4}\)inches. Reading a Ruler Some rulers measure in English units:

unit	abbreviation	equivalents
inch	in. or "	1 in. = \(\frac{1}{12}\) ft.
foot	ft. or '	1 ft. = 12 in.
yard	yd.	1 yd. = 36 in.
1 yd. = 3 ft.

Other measure in metric units:

unit	symbol	equivalents
millimeter	mm	1 mm = 0.001 m
centimeter	cm	1 cm = 0.01 m
1 cm = 10 mm
meter	m	1 m = 100 cm
1 m = 1000 mm

Reading a Ruler Here is a standard metric ruler. The small divisions are equal to 0.1 centimeter, or 1 millimeter, each. The arrow above this ruler is at 1.4 centimeters. Reading a Ruler Click on the location of the arrow on the ruler above. 2.6 cm 3.3 cm 2.1 cm 1.9 cm None of these Question 1 of 8 The marks on the ruler are 0.1 cm apart. Try again. The arrow is between 2.0 cm and 3.0 cm. Try again. The arrow is 0.1 cm, or 1 mm, past the 2 cm mark. The arrow is between 2.0 cm and 3.0 cm. Try again. One of these shows the location of the arrow. Try again. The marks on the ruler are 0.1 cm apart. Reading a Ruler Click on the location of the arrow on the ruler above. \[3.6 \quad\text{in.}\] \[2\frac{1}{4} \quad\text{in.}\] \[2.2 \quad\text{in.}\] \[2\frac{1}{8} \quad\text{in.}\] \[\text{None of these}\] Question 2 of 8 The arrow is between 2 in. and 3 in. Try again. The arrow is \(\color{#0a7d0a}{\frac{2}{8}}\) inches, or \(\color{#0a7d0a}{\frac{1}{4}}\) inches, past the 2-inch mark. The marks on this ruler show eighths of an inch, not tenths of an inch. Try again. The arrow is two marks past 2 inches, not one. Try again. One of these shows the location of the arrow. Try again. The marks on the ruler are one-eight inch apart. Reading a Ruler Click on the location of the arrow on the ruler above. \[7\frac{1}{4} \quad\text{in.}\] \[7\frac{3}{8} \quad\text{in.}\] \[7\frac{3}{5} \quad\text{in.}\] \[7.3 \quad\text{in.}\] \[\text{None of these}\] Question 3 of 8 The arrow is 3 marks, not 2 marks, past 7 inches . Try again. The arrow is \(\color{#0a7d0a}{\frac{3}{8}}\) inches past the 7-inch mark. The marks on this ruler show eighths of an inch, not tenths of an inch. Try again. The marks on this ruler show eighths of an inch, not tenths of an inch. Try again. One of these shows the location of the arrow. Try again. The marks on the ruler are one-eighth inch apart. Reading a Ruler Click on the location of the arrow on the ruler above. 0.7 cm 1.7 cm 0.5 cm 7 cm None of these Question 4 of 8 The arrow is 0.7 cm, or 7 mm, past the beginning of the ruler. The arrow is between 0.0 cm and 1.0 cm. Try again. The marks on the ruler are 0.1 cm apart. Try again. The marks on the ruler are 0.1 cm, or 1 mm, apart. Try again. One of these shows the location of the arrow. Try again. The marks on the ruler are 0.1 cm apart. Reading a Ruler There are four questions remaining. For each of these questions, you will be asked to identify the length of a line segment. Reading a Ruler Click on the length of the line segment that is above the ruler. \[26 \quad\text{in.}\] \[34 \quad\text{in.}\] \[2\frac{5}{8} \quad\text{in.}\] \[3\frac{3}{8} \quad\text{in.}\] \[\text{None of these}\] Question 5 of 8 Each mark represents \(\color{#be0a0a}{\frac{1}{8}}\) of an inch. Try again. Each mark represents \(\color{#be0a0a}{\frac{1}{8}}\) of an inch. Try again. The line segment begins at 0 and stops at \(\color{#0a7d0a}{2\frac{5}{8}}\) inches. This is a length of \(\color{#0a7d0a}{2\frac{5}{8}}\) inches. The line segment is between 2 and 3 inches long. Try again. One of these shows the length of the line segment. Try again. The line segment begins at 0 and ends 5 marks past 2 inches. Reading a Ruler Click on the length of the line segment that is above the ruler. 17 cm 3.2 cm 2.7 cm 1.7 cm None of these Question 6 of 8 The line segment is 17 mm, not 17 cm. Try again. The line segment begins at 1 cm and stops at 2.7 cm. Try again. The line segment begins at 1 cm, not at the beginning of the ruler. Try again. The line segment begins at 1 cm and stops at 2.7 cm. This is a length of 1.7 cm. One of these shows the length of the line segment. Try again. The line segment begins at 1 cm and ends 7 marks past 2 cm. Reading a Ruler Click on the length of the line segment that is above the ruler. \[2\frac{1}{2} \quad\text{ in.}\] \[1\frac{3}{8} \quad\text{in.}\] \[1\frac{6}{8} \quad\text{in.}\] \[7\frac{3}{4} \quad\text{in.}\] \[\text{None of these}\] Question 7 of 8 The line segment is between 1 and 2 inches long. Try again. The line segment begins at 6 inches and stops at \(\color{#be0a0a}{7\frac{6}{8}}\) inches. Try again. The line segment begins at 6 in. and stops at \(\color{#0a7d0a}{7\frac{6}{8}}\) in. This is a length of \(\color{#0a7d0a}{1\frac{6}{8}}\) or \(\color{#0a7d0a}{1\frac{3}{4}}\) inches. The line segment begins at 6 inches, not at the beginning of the ruler. Try again. One of these shows the length of the line segment. Try again. The line segment begins at 6 inches and ends 6 marks past 7 inches. Reading a Ruler Click on the length of the line segment that is above the ruler. 0.8 cm 3.8 cm 0.5 cm 1.8 cm None of these Question 8 of 8 The line segment begins at 3 centimeters and stops at 3.8 centimeters. This is a length of 0.8 centimeters. The line segment begins at 3 cm, not at the beginning of the ruler. Try again. Each mark on the ruler is 0.1 cm. Try again. The line segment begins at 3 cm and stops at 3.8 cm. Try again. One of these shows the length of the line segment. Try again. The line segment begins at 3 cm and ends 8 marks to the right. Reading a Ruler