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 10 squirrels long.
Now let's measure the same fence with ponies.
The fence is 5 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 start color blueD, b, l, u, e, space, l, i, n, e, end color blueD below using both rectangles and a centimeter ruler:
The line is
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
rectangles long.

The line is
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
centimeters long.

The line is 12 rectangles long.
The line is 6 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 start color greenD, g, r, e, e, n, space, l, i, n, e, end color greenD using the centimeter ruler.
The line is
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i
centimeters long.

Now, measure the start color greenD, g, r, e, e, n, space, l, i, n, e, end color greenD using the inch ruler.
The line is
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i
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 8 pencils tall. Lynn measures the same desk with her pen. The desk is 9 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.