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Measuring Length Practice
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Measuring Length Practice
Ana, Wiremu and Rawiri are checking lengths for a small building project. Read each task carefully. Include units in every measurement, and show your working where needed.
Choose and read length units
Remember: 10 mm = 1 cm and 100 cm = 1 m.
1.Ana needs to measure the length of a short screw to the nearest millimetre. Which tool is the best choice?
- A 15 cm ruler with millimetre marks
- A 5 m tape measure with no small divisions
- A metre stick marked only in centimetres
2.A timber beam is about 4.8 m long. Write this length in centimetres.
3.Wiremu measures a panel as 236 cm. Convert this measurement to metres and centimetres.
4.A piece of trim starts at 0 cm and ends at 6 cm plus 4 small millimetre divisions on a ruler. What is its length in centimetres and millimetres?
Plan the cuts
The team must check measurements before cutting so that materials fit safely.
5.Rawiri needs a board 1.25 m long. The available board is 2 m long. How much will be left after one 1.25 m piece is cut off? Give your answer in metres and centimetres.
6.A tape measure reads 3.46 m for a frame opening. How many millimetres is this?
7.Ana and Wiremu measure the same beam. Ana records 2.37 m and Wiremu records 2.4 m. Could both measurements be reasonable? Explain how the results might differ.
8.A plan shows a wall length of 7.2 m. A new measurement is 7.05 m. Is the new measurement longer or shorter, and by how many centimetres?
9.Before measuring a 1 m length of timber, Rawiri estimates it is 95 cm. The actual length is 1.08 m. How far off was the estimate? Give the difference in centimetres.
10.A 5 m length of cable is cut into two pieces: 185 cm and 2.6 m. How much cable remains? Give your answer in centimetres.
11.The team wants to check a 3 m length without using a single 3 m tool. Suggest two measured lengths they could mark end-to-end to make exactly 3 m. Include units.
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