# 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 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 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