Worksheet: Estimating Metric Units of Length

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?

  • A 12 mm
  • B 12 cm
  • C 12 km
  • D 12 m

Q2:

Jennifer has 71 dominoes. Each one is 4 centimeters long. If she lines them up end to end as shown, how many meters long is the line of dominoes?

Q3:

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

  • A 200 m
  • B 3 m
  • C 100 m
  • D 1 m

Q4:

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

  • A 25 cm
  • B 60 cm
  • C 1 m
  • D 2 m
  • E 4 m

Q5:

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

  • A 6 cm
  • B 100 cm
  • C 50 cm
  • D 70 cm
  • E 60 cm

Q6:

Estimate, in centimeters, the most likely length of an eraser.

  • A 40 cm
  • B 60 cm
  • C 80 cm
  • D 20 cm
  • E 4 cm

Q7:

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

  • A 10 cm
  • B 50 cm
  • C 2 m
  • D 1 m
  • E 3 m

Q8:

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

  • A 5 dm
  • B 2 m
  • C 12 cm
  • D 12 mm
  • E 70 cm

Q9:

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

  • A 9 cm
  • B 30 dm
  • C 2 m
  • D 80 cm
  • E 7 mm

Q10:

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

  • A 4 mm
  • B 28 cm
  • C 90 cm
  • D 8 dm
  • E 7 m

Q11:

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

  • A 5 cm
  • B 7 cm
  • C 20 cm
  • D 200 cm
  • E 30 cm

Q12:

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

  • A 84 m
  • B 2 0 0 0 cm
  • C 44 km

Q13:

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

  • A 3 cm
  • B 10 cm
  • C 3 m
  • D 10 m

Q14:

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

  • A 1 cm
  • B 90 cm
  • C 8 cm
  • D 50 cm

Q15:

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

  • A 34 cm
  • B 2 cm
  • C 90 cm
  • D 6 cm
  • E 1 cm

Q16:

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

  • A 5 cm
  • B 2 cm
  • C 70 cm
  • D 25 cm
  • E 60 cm

Q17:

What is the approximate height of the Cairo Tower?

  • A 200 m
  • B 2 cm
  • C 200 cm
  • D 2 m

Q18:

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?

  • A to the nearest micrometer
  • B to the nearest millimeter

Q19:

William estimates the height of a mountain to be 1 4 0 0 cm. Is this realistic?

  • ANo
  • BYes

Q20:

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

  • A 50 cm
  • B 5 m
  • C 6 cm
  • D 1 m
  • E 2 m

Q21:

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

  • A 10 m
  • B 300 m
  • C 10 cm
  • D 300 cm

Q22:

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

  • A 10 m
  • B 40 cm
  • C 160 m
  • D 160 cm

Q23:

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?

  • A to the nearest centimeter
  • B to the nearest millimeter

Q24:

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

  • A 3 m
  • B 20 cm
  • C 70 cm
  • D 2 m
  • E 1 m

Q25:

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

  • A 120 cm
  • B 12 yd
  • C 12 m
  • D 120 ft
  • E 2 km

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