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Measuring Lengths Fun!
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Measuring Lengths Fun!
The school canteen is preparing a new serving area. Help Mason, Hamish and Isla choose lengths and units that make sense. Remember: 10 mm = 1 cm and 100 cm = 1 m.
Plan the measurements
Use the clues to solve each canteen challenge.
1.Isla estimates the length of a lunch tray as 30 cm. Which estimate is most sensible for a pencil: 15 mm, 15 cm or 15 m?
- 15 mm
- 15 cm
- 15 m
2.A counter mat is 80 cm long. How many millimetres long is it? Show or explain how you know.
3.Hamish measures a serving bench as 1 m 25 cm. Write this length in centimetres.
4.Put these lengths in order from shortest to longest: 95 cm, 1 m, 120 cm, 85 cm.
5.A paper sign is 42 cm wide. Another sign is 390 mm wide. Which sign is wider, and by how many centimetres?
Choose a unit and measure
Use mm for very small lengths, cm for hand-sized objects and m for longer distances.
6.Match each canteen measurement to the best unit: thickness of a coin; length of a lunchbox; length of the canteen counter.
- Thickness of a coin
- Length of a lunchbox
- Length of the canteen counter
- centimetres (cm)
- millimetres (mm)
- metres (m)
7.Mason says a drink bottle is 25 m tall. Is this a reasonable measurement? Rewrite it using a more suitable unit and length.
8.The serving bench is 2 m long. Isla measures 75 cm of it. How much of the bench is left unmeasured? Give your answer in centimetres.
9.True or false? If you measure from the 1 cm mark instead of the 0 mark on a ruler, you should subtract 1 cm from the reading.
TrueFalse
10.The canteen needs a ribbon exactly 1 m long. Hamish has a 35 cm piece and a 48 cm piece. How many more centimetres of ribbon does he need?
11.Use a ruler to measure a pencil or another small object. Write its length in centimetres, then convert the same length to millimetres.
12.Explain why measuring a counter in metres is usually more useful than measuring it in millimetres.
3 printable pages
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