Measuring lengths with different units

Use different units to measure the same object.

Measuring lengths with different units

Let's measure a fence with squirrels!
The fence is 1010 squirrels long.
Now let's measure the same fence with ponies.
The fence is 55 ponies long.
Why did it take fewer ponies to measure the length of the fence?
Choose 1 answer:
Choose 1 answer:
The ponies are longer than the squirrels.
Because the ponies are longer, it will take fewer ponies to measure the length of the fence.

Practice problem 1

This is a rectangle.
Let's measure the blue line\blueD{\text{blue line}} below using both rectangles and a centimeter ruler:
The line is
rectangles long.
The line is
centimeters long.
The line is 1212 rectangles long.
The line is 66 centimeters long.
The width of each rectangle is _____ than a centimeter.
Choose 1 answer:
Choose 1 answer:
So, it takes _____ rectangles than centimeters to measure the line.
Choose 1 answer:
Choose 1 answer:
The width of each rectangle is shorter than a centimeter.
So, it takes more rectangles than centimeters to measure the line.

Practice problem 2

Measure the green line\greenD{\text{green line}} using the centimeter ruler.
The line is
centimeters long.
Now, measure the green line\greenD{\text{green line}} using the inch ruler.
The line is
inches long.
It takes _____ centimeters than inches to measure the line.
Choose 1 answer:
Choose 1 answer:
So, a centimeter is _____ than an inch.
Choose 1 answer:
Choose 1 answer:
It takes more centimeters than inches to measure the line.
So, a centimeter is shorter than an inch.

Challenge question

Raj measures the height of a desk with his pencil. He finds out the desk is 88 pencils tall. Lynn measures the same desk with her pen. The desk is 99 pens high.
Which is longer?
Choose 1 answer:
Choose 1 answer:
Because we can measure the desk with fewer pencils than pens, Raj's pencil must be longer.