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Measurement Tools and Estimation
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Measurement Tools and Estimation
Aisha’s team is preparing a measurement station for a community science day. Use sensible tools, metric units and careful estimates to solve the challenges. Show working where useful.
Choose and estimate
Think about the size, shape and material of each item before choosing a tool or unit.
1.The team needs to measure (a) the length of a pencil, (b) the distance a marble rolls along the floor, and (c) the mass of a bag of seeds. Choose the best tool for each: 30 cm ruler, tape measure, or digital scale.
2.Before measuring, the team estimates the length of a folding table as 1.8 m. Is this a reasonable estimate? Explain briefly, and name a suitable tool to check it.
3.Which is the most reasonable estimate for the width of a classroom door?
- 8 mm
- 800 mm
- 8 m
4.A banner is 275 cm long. Convert this length to metres.
5.A sensor cable is 3.6 m long. Convert its length to centimetres.
6.A measuring tape has a zero mark at one end. The marble starts at 0 cm and stops at 186 cm. How far did it roll? Give your answer in metres and centimetres.
Measure accurately
A careful measurement depends on the way the tool is used as well as the tool itself.
7.To measure a small block, Wiremu places its left edge at the 2 cm mark on a ruler and reads 9 cm at the right edge. What is the block’s length? Explain why it is not 9 cm.
8.When measuring a distance with a ruler, you should line up the starting edge with zero where possible and record the unit as well as the number.
TrueFalse
9.Match each familiar measurement benchmark with its approximate length.
- Width of an adult thumb
- Length of a large hand span
- Length of an adult foot
- Length of a long walking step
- About 20 cm
- About 2 cm
- About 25 cm
- About 70 cm
10.The team estimated a table length as 1.8 m, then measured it as 1.74 m. How far was the estimate from the measurement? Give the difference in centimetres.
11.The team wants to record how far a marble rolls on a straight track. Describe a fair, accurate method, including how to position the measuring tool and what to write down.
3 printable pages
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