Using different units to measure
Estimating Length
Units of Measurement
100
Mara measures this pencil and says it is 8 inches. Troy measures the same pencil and says it is 20 centimeters. Did the length of the pencil change?
No it did not
100
What does it mean to estimate?
to give an approximate answer based on mathematical thinking
100
Which is longer - inches or centimeters?
inches
200
Laura is 5 years old and she is walking to the store with her father. Who will take more steps - Laura or her father?
Laura will take more steps because her steps are shorter.
200
Which of these is a good estimate for the length of this eraser?
a. 2 centimeters
b. 2 inches
c. 2 feet
b. 2 inches
200
Which is longer - feet or yards?
yards
300
Vlad measures this car in feet and then he measures again using yards. Which one will he use more of - feet or yards?
feet, because feet are smaller than yards
300
Is 3 feet a good estimate for the length of this airplane?
No- the plane is much longer than 3 feet.
300
How many inches are in a foot?
12
400
Riley wants to measure the length of his classroom. Which tool should he use if he wants the measurement to be the FEWEST number of units?
a. a marker
b. a journal
c. a broom
c. a broom
400
Yussef measures the doorway and finds that it is about 1 meter wide. Which of these objects is also about 1 meter?
a. a computer
b. a truck
c. a guitar
c. a guitar
400
How many feet are in a yard?
3
500
Rania and Cassi measure the same table.
Rania uses 4 notebooks to measure the length.
Cassi uses 18 erasers to measure the length.
Explain how you know that the erasers are smaller than the notebooks.
The erasers are smaller than the notebooks because you need more erasers than notebooks to measure the length of the table.
500
Estimate how tall your teacher is using feet.
A good estimate would likely be 5 or 6 feet
500
How many centimeters are in a meter?
100