Look at problem A. How can you put the objects in order from shortest to longest? How do you know what order to put the objects in?
Shortest to longest: eraser, marker, and pencil; answers vary.
Look at problem B. Which tools use standard units of measurement?
A ruler and a yardstick use standard units of measurement.
What can a ruler measure?
Small objects that are less than 12 inches.
What can a yardstick measure?
Objects that are bigger than
12 inches but less than 36
Is a pencil more or less than 12 inches?
It is less than 12 inches.
Which tool would you use to measure the pencil? Why?
Use a ruler because a pencil is less than 12 inches.
Look at problem C. How can you measure the piece of wood on the ruler?
Line up one end of the wood on the 0 and then look where the other end of the wood lines up.
How many inches long is the piece of wood?
It is 4 inches long.
How many centimeters long is the piece of wood?
It is 10 centimeters long.
Which unit does it take more of to measure the piece of wood?
It takes more centimeters than inches to measure the piece of wood.
Why does it take more centimeters than inches to measure the piece of wood?
Centimeters are smaller
than inches, so it takes
more centimeters to cover the length of the piece of wood.
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