Midcontinent Research for Education and Learning
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Common Core Mathematics K2
Cluster
Measure lengths indirectly and by iterating length units.
Grade 1
1.MD.1.
Order three objects by length; compare the lengths of two objects indirectly by using a third object.
1.MD.2.
Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of samesize length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.