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Metric Length Measurement Assessment
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Metric Length Measurement Assessment
Tevita, Wiremu and Losa are setting up a stargazing night. Use metric units carefully to measure, convert and solve each length puzzle. Show working for calculations. You will need a ruler marked in millimetres for Question 1.
Measure and choose units
Lengths for the stargazing setup
1.A cardboard star is 84 mm wide. How many centimetres and millimetres is that?
2.Which tool and unit are most suitable for measuring the length of a telescope tube: a ruler in millimetres, a tape measure in centimetres, or a trundle wheel in kilometres?
- Ruler in millimetres
- Tape measure in centimetres
- Trundle wheel in kilometres
3.Wiremu estimates a 1.8 m folding table to be about 2 m long. Is this a sensible estimate? Explain briefly.
Convert and compare
Remember: 1 m = 100 cm and 1 cm = 10 mm.
4.The stargazing mat is 2.35 m long. Convert its length to centimetres.
5.A cable is 460 cm long. Write this length in metres and centimetres.
6.The telescope tripod leg is 725 mm long. Convert this to centimetres and millimetres.
7.Order these three lengths from shortest to longest: 1.2 m, 118 cm, 1,250 mm.
Plan the stargazing site
Use the measurements and clues to solve the setup problems.
8.The safe viewing area is 6.4 m long. Tevita has marked 275 cm of it. How much length is still unmarked? Give your answer in metres and centimetres.
9.Losa joins two lengths of light cord, 1.85 m and 2.7 m. Is the total longer than 4.5 m? Calculate the total and decide.
10.A 3.6 m banner is cut into 8 equal lengths for the star markers. How long is each piece?
11.A path from the car park to the viewing spot is 36 m. Wiremu walks it 5 times to carry equipment. How far does he walk altogether? Give your answer in metres and centimetres.
12.The measurement of a telescope stand is 146 cm. Round it to the nearest metre, then to the nearest 10 cm.
3 printable pages
Page 1
Page 2
Page 3
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