# 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
• B2,000 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