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In this lesson, we will learn how to estimate 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?

Q2:

Shady 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?

Q3:

What is the approximate height of the Cairo Tower?

Q4:

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

Q5:

Engy 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?

Q6:

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

Q7:

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

Q8:

Which measurement below is closest to the height of a school building?

Q9:

Which measurement below is closest to the height of a door?

Q10:

Which measurement below is closest to the height of your friend?

Q11:

Which measurement below is closest to the height of a chair?

Q12:

Which measurement below is closest to the height of a closet?

Q13:

Q14:

Sally 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?

Q15:

Q16:

Nabil estimates the height of a mountain to be cm. Is this realistic?

Q17:

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

Q18:

Q19:

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

Q20:

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

Q21:

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

Q22:

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

Q23:

Which of these is the best estimate for the height of the great pyramid?

Q24:

Q25:

Which is the most suitable measurement for the height of a lamppost?

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