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Nonstandard Unit Measurement Hunt

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Nonstandard Unit Measurement Hunt

A makerspace team measured objects using two kinds of units. A small paper clip is 3 cm long; a large paper clip is 5 cm long. Read the measurement log, solve the challenges, and explain why a measurement needs a clearly defined unit. For calculations, assume the clips were placed end to end with no gaps or overlaps.

Object

Unit used

Clip count

Pencil

Small paper clip (3 cm)

6

Notebook

Large paper clip (5 cm)

4

Glue stick

Small paper clip (3 cm)

5

Scissors

Large paper clip (5 cm)

3

Decode the measurements

Use the log and the unit lengths given in the mission instructions.

1.How long is the pencil in centimeters? Show the multiplication you use.
2.How long is the notebook in centimeters?
  • 9 cm
  • 20 cm
  • 25 cm
  • 40 cm
3.Compare the lengths of the glue stick and scissors. Are they different? If so, by how many centimeters?
4.Put these objects in order from shortest to longest: notebook, pencil, glue stick, scissors.
10152025

Find the measurement trap

A count is only useful for comparing lengths when the units are the same size.

5.True or false: The notebook is shorter than the pencil because it took fewer clips to measure.
TrueFalse
6.Gabriela says, “The pencil is 6 clips long, so it must be longer than the 4-clip notebook.” Explain the mistake.
7.The team wants to measure another object so its result can be compared fairly with every item in the log. What should everyone do?
  • Use the same type and size of clip, placed end to end
  • Let each person choose a different clip
  • Leave small gaps so the clips do not touch
  • Count clips without recording their size
8.If the pencil were measured with large 5 cm clips instead, how many whole clips fit along the 18 cm pencil, and how much of the pencil remains uncovered?

Plan a better hunt

Use the measurement ideas to design a reliable mini-investigation.

9.Name two rules the makerspace team should follow so different people can measure an object consistently.
10.Suggest one everyday object to measure with a nonstandard unit. Name the object, the unit you would use, and one reason this measurement might be useful.

3 printable pages

  • Nonstandard Unit Measurement Hunt, page 1 of 3: Decode the measurements

    Page 1

  • Nonstandard Unit Measurement Hunt, page 2 of 3: Find the measurement trap

    Page 2

  • Nonstandard Unit Measurement Hunt, page 3 of 3: Plan a better hunt

    Page 3

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