Number as Measure Math Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
Two students measure the same desk. Student A says it is 90 cm; Student B says it is 0.9 m. Are they in disagreement?

Solution

  1. 1
    Convert Student A's measure to meters: 90 cm=0.9 m90 \text{ cm} = 0.9 \text{ m}.
  2. 2
    Both students measured the same length — they agree.

Answer

No disagreement: 90 cm=0.9 m\text{No disagreement: } 90 \text{ cm} = 0.9 \text{ m}
The same quantity can be expressed with different numbers depending on the unit. Unit conversion shows they describe the same measurement. Always convert to a common unit before declaring a disagreement.

About Number as Measure

Using numbers to represent the size or amount of a real-world quantity, always paired with a unit of measurement.

Learn more about Number as Measure →

More Number as Measure Examples

Example 1 easy

A pencil measures 17.3 cm long. Identify the number, the unit, and what is being measured.

Example 2 medium

A rope is measured as 3 meters. Convert this to centimeters and to millimeters.

Example 4 medium

A thermometer reads [formula]C. Convert this to Fahrenheit using [formula].

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