Worksheet: Estimating Length: Metric Units

In this worksheet, we will practice estimating the length of different real-life objects by choosing the most logical unit of length and value in metric units.

Q1:

Which of the following is the best estimate for the length of a pen?

  • A12 cm
  • B12 m
  • C12 km
  • D12 mm

Q2:

Which measurement below is closest to the length of a car?

  • A200 m
  • B1 m
  • C100 m
  • D3 m

Q3:

Which of the following is a reasonable length for a tennis racket?

  • A25 cm
  • B60 cm
  • C2 m
  • D1 m
  • E4 m

Q4:

How long is the shown object in reality? Choose the answer that gives the best estimation.

  • A6 cm
  • B60 cm
  • C70 cm
  • D100 cm
  • E50 cm

Q5:

Estimate, in centimetres, the most likely length of a rubber.

  • A4 cm
  • B60 cm
  • C40 cm
  • D80 cm
  • E20 cm

Q6:

Which of the following is a reasonable length for a spoon?

  • A10 cm
  • B50 cm
  • C2 m
  • D3 m
  • E1 m

Q7:

Which of the following is a reasonable length for a toothbrush?

  • A2 m
  • B70 cm
  • C12 cm
  • D12 mm
  • E5 dm

Q8:

Which of the following is the best approximation for the length of an adult’s leg?

  • A80 cm
  • B9 cm
  • C7 mm
  • D2 m
  • E30 dm

Q9:

Which of the following would be the best estimate for the length of an adult’s shoe?

  • A4 mm
  • B28 cm
  • C8 dm
  • D7 m
  • E90 cm

Q10:

Estimate the answer in centimetres and complete the following statement: The length of your bed is .

  • A7 cm
  • B20 cm
  • C5 cm
  • D30 cm
  • E200 cm

Q11:

Which of these is most likely to be the distance between two cities?

  • A44 km
  • B 2,000 cm
  • C84 m

Q12:

Which of these is most likely to be the length of a car?

  • A10 m
  • B10 cm
  • C3 m
  • D3 cm

Q13:

Which measurement below is closest to the length of a pencil?

  • A50 cm
  • B1 cm
  • C8 cm
  • D90 cm

Q14:

Which of the following would be the best estimate for the length of an adult’s little finger?

  • A6 cm
  • B90 cm
  • C34 cm
  • D2 cm
  • E1 cm

Q15:

Which of the following would be the best approximation for the length of the longest side of a maths book?

  • A5 cm
  • B2 cm
  • C60 cm
  • D70 cm
  • E25 cm

Q16:

What is the approximate height of the Cairo Tower?

  • A2 m
  • B200 m
  • C200 cm
  • D2 cm

Q17:

Charlotte wants to measure the length of a plant cell. She has a microscope and a stage micrometer. Would she be more accurate measuring the length to the nearest millimeter or micrometer?

  • Ato the nearest millimeter
  • Bto the nearest micrometer

Q18:

William estimates the height of a mountain to be 1,400 cm. Is this realistic?

  • ANo
  • BYes

Q19:

Which of the following is a reasonable length for a door key?

  • A50 cm
  • B1 m
  • C5 m
  • D6 cm
  • E2 m

Q20:

Which of these is most likely to be the height of a classroom?

  • A10 m
  • B300 m
  • C300 cm
  • D10 cm

Q21:

Which of these is most likely to be the height of a teacher?

  • A160 cm
  • B10 m
  • C160 m
  • D40 cm

Q22:

Anthony wants to cut out a hole in a piece of wood through which he will be able to place a beam of wood whose face is a rectangle. To determine the size of the hole that he needs to cut, would it be better to measure the beam’s dimensions to the nearest centimeter or nearest millimeter?

  • Ato the nearest millimeter
  • Bto the nearest centimeter

Q23:

How long is the shown object in reality? Choose the answer that gives the best estimation.

  • A20 cm
  • B3 m
  • C1 m
  • D70 cm
  • E2 m

Q24:

How long is the shown object in reality? Choose the answer that gives the best estimation.

  • A120 cm
  • B12 yd
  • C12 m
  • D2 km
  • E120 ft

Q25:

Which of these is most likely to be the length of a classroom?

  • A1 cm
  • B7 cm
  • C1 m
  • D7 m

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