Skill: Compare lengths
Explanation and Free Practice Resources
Length comparison involves determining which object or distance is longer, shorter, or equal by measuring with the same standard unit and comparing the resulting numerical measurements. Quantities may be represented with rulers, measurement equations, or number lines; when different units such as feet and inches or meters and centimeters are used, they must be converted to a common unit before comparison. The focus is on whole-number measurements and straightforward fractional measurements, not on more advanced unit-rate reasoning, precision, or algebraic measurement formulas.
On this page:
- Learn “Compare lengths” with a detailed explanation of the concept
- Master “Compare lengths” with unlimited, free practice problems
- Download (or modify) a free worksheet on Compare lengths you can use at home or in class with practice problems that scaffold and explore “Compare lengths” from different perspectives.
- Start working on adaptive units like “Measurement Foundations - Intro” or “Measurement - Units Intro - Customary” that introduce, teach, or practice “Compare lengths” to maximize your learning.
Detailed Explanation: Compare lengths
To compare lengths:
- Make sure both lengths use the same unit.
- Compare the numbers.
- Use words such as longer, shorter, or equal, or use , , or .
Example: A pencil is inches long. A crayon is inches long. Which is longer?
Both measurements are in inches, so compare and :
Therefore, the pencil is longer than the crayon. It is also inches longer because:
Learn by doing: Compare lengths
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Practice with unlimited practice problems
Practice:
Measurement - Add String Lengths - Inches, More Than a Foot?
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Download/Modify Free Grade 3 'Compare lengths' Worksheet
Print this free 'Compare lengths' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- Measurement - Add String Lengths - Inches, More Than a Foot?
- Measurement - Add String Lengths - Centimeters, More Than a Meter?
- Measurement - Subtract String Lengths - Inches, Less Than a Foot?
- Measurement - Subtract String Lengths - Centimeters, Less Than a Meter?
- Measurement - Compare Length - Pictures Longer or Shorter
- Measurement - Compare Length - Longer or Shorter
- Measurement Less or More - Length (customary)
- Measurement Less or More - Length (metric)
Units Teaching This Skill
These adaptive units introduce, teach, or reinforce this skill (Compare lengths) through scaffolded problems that grow in difficulty as concepts are understood.