Georgia 2.MDR.5.3
The Standard
Measure to determine how much longer one object is than another and express the length difference in terms of a standard-length unit.
Georgia's K-12 Mathematics Standards · Estimate and measure the lengths of objects and distance to solve problems found in real-life using standard units of measurement, including inches, feet, and yards and analyze graphical displays of data to answer relevant questions.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students measure two objects using the same standard unit. They compare the measurements and state how much longer one object is, including the unit.
What Mastery Looks Like
- Students align each object with zero, measure accurately, and record both lengths in the same unit. They subtract the shorter length from the longer length or count on, then label the difference with the correct unit.
Common Misconceptions
- Students may start each object at a different ruler mark or mix inches and centimeters. They may report the longer object's full length instead of the difference, or subtract the longer length from the shorter one.
How to Assess It
- Give each student a 14-centimeter strip and a 9-centimeter strip. Ask, “How much longer is the longer strip? Show your measurement or equation and label the unit.”
Lesson moves
Ways to Teach It
Give pairs two classroom objects, centimeter rulers, and a recording sheet to measure each object and find the length difference.
Ask, “Mia's ribbon is 18 inches and Jay's is 11 inches. How much longer is Mia's, and how do you know?”
Play Compare and Score: students draw two length cards, find the difference, and earn a point for a correct unit-labeled answer.
Tell students a 12-inch shelf must match an 8-inch shelf, then ask how much wood must be added to the shorter shelf.
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Printable 2.MDR.5.3 Worksheet
A ready-to-print activity worksheet aligned to 2.MDR.5.3, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- 2.MDR.5
Estimate and measure the lengths of objects and distance to solve problems found in real-life using standard units of measurement, including inches, feet, and y...
- 1.MDR.6.1
Estimate, measure, and record lengths of objects using non-standard units, and compare and order up to three objects using the recorded measurements. Describe t...
- 2.MDR.5.2
Estimate and measure the length of an object or distance to the nearest whole unit using appropriate units and standard measuring tools.
- K.MDR.7.1
Directly compare, describe, and order common objects, using measurable attributes (length, height, width, or weight) and describe the difference.
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