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Similar to the metric system, it is better to use the smaller unit, inches, in estimating lengths that are shorter than a foot, and the larger unit, feet, in estimating lengths that are longer than 12 inches. At the end of the lesson, the student will learn to analyze different lengths of objects and estimate their measurements.
See the fact file below for more information on the estimating lengths or alternatively, you can download our 27-page Measurement and Data: Estimating Length 2.MD.3 worksheet pack to utilise within the classroom or home environment.
Key Facts & Information
At the end of the lesson, the student will learn to analyze different lengths of objects and estimate their measurements. Also, the student will be able to know what measuring device is more appropriate to use by estimating their lengths.
A Note for the Teacher
When estimating length, take note of the following:
- It is more practical to use a measuring tool that is closer to the length of the object.
- General units for length: cm, m, km (metric), in, ft, yd, mi (imperial).
- Remember that smaller objects can be measured using centimeters and inches, while longer objects can be measured using meters and feet.
Visually, we can infer if something is short or long. With the knowledge of different unit systems, we can be more precise in estimating different lengths.
The metric system can be labeled with centimeters, meters, and kilometers.
A centimeter (cm) is smaller than a meter (m): 1 m = 100 cm
A meter (m) is smaller than a kilometer (km): 1 km = 1000 m
Therefore, it is better to use centimeters in estimating short lengths and meters in estimating lengths that are longer than 100 cm. Kilometers, on the other hand, are used to measure the length of a distance.
The customary system can be labeled with inches, feet, yards, and miles.
An inch (in) is smaller than a foot (ft): 1 ft = 12 in
A foot (ft) is smaller than a yard (yd): 1 yd = 3 ft
A yard (yd) is smaller than a mile (mi): 1 mi = 2025 yd
Similar to the metric system, it is better to use the smaller unit, inches, in estimating lengths that are shorter than a foot, and the larger unit, feet, in estimating lengths that are longer than 12 inches. Yards and miles are often used to measure greater lengths such as distances.
With this knowledge of different units, we know that smaller objects are better to be measured using centimeters and inches. The most appropriate measuring device to be used is a ruler.
Meters and feet are best applied for longer measurements such as height and other larger objects like a car. Measuring tapes, meter sticks, and yardsticks are the measuring tools that apply these larger units.
Measurement and Data: Estimating Length 2.MD.3 Worksheets
This is a fantastic bundle that includes everything you need to know about Measurement and Data: Estimating Length across 26 in-depth pages. These are ready-to-use worksheets that align with the Common Core CCSS code 2.MD.3 for Measurement and Data: Estimating Lengths.
Complete List Of Included Worksheets
- A lesson plan
- Warm-up activity
- Math theory explained
- Assisted learning activities
- Independent learning activities
- Extension activities and games
- Answer keys
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Use With Any Curriculum
These worksheets have been specifically designed for use with any international curriculum. You can use these worksheets as-is, or edit them using Google Slides to make them more specific to your own student ability levels and curriculum standards.